Choosing the colour of a swimming pool

How to choose the colour of a swimming pool

How swimming pool interior colours affect water appearance, why pools don’t look the same as the surface colour, and how light, depth, and surroundings change the final look.

Explore pool interior colours and how they affect water colour

Use these links to see how different pool interior colours typically look once the pool is filled with water.

Choose a colour

Cobalt Blue.
Light Blue.
Black pool.
Grey pool.
Beach | Sand | Beige pool.
Pacific Blue.
Skye Blue.
Light Grey.
Gold | Brown pool interior.

What Colour Will Swimming Pool Water Be | Pool Water Colour Explained

What actually determines the colour of pool water

The final colour of pool water is created by several interacting factors, not just the surface colour.

Pool interior colour.
Waterline Tile colour (minimal)
Pool depth.
Water clarity.
Sunlight and sky conditions.
Surface texture and finish.
Indoor vs outdoor environment

White Pool Interior

This swimming pool has white waterline tiles with a white pebble interior.

What colour is the water of a white surface pool? Full sun with blue sky: light blue to aqua, sometimes a bright Caribbean-blue. Often with a sparkling appearance. Minimal sky reflection or light cloud: soft pale blue. Overcast conditions: muted blue-grey. Very shallow areas (steps/seats): very light blue, almost clear. White surfaces reflect the most light, which amplifies the blue wavelengths water naturally shows.

As shown, the deeper areas of the swimming pool appear a darker tone of blue, while shallower areas look lighter. Steps and seating clearly show how water depth increases colour intensity.

Why does a white swimming pool look blue?

White reflects maximum light.
Blue wavelengths dominate.
Looks brightest and clearest in sun.
Depth increases blue tone.

Pool interior finishes this applies to

The way colour appears in pool water applies regardless of the interior finish materials. These same colour principles apply to tiled, pebble, and painted swimming pools.

Surfaces we install

Swimming Pool Tiling
Pebble Pool Interiors
Swimming Pool Painting

Royal Blue | Mid Blue | Pool Interior

This swimming pool has Mid-blue waterline tiles with a Royal Blue pebble interior.

What colour is the water of a mid blue surface pool? Colours: Cobalt Blue | Royal Blue | Mid-Blue are basically the same - most people would not see the difference once it is under the water as it will reflect the water the same way with each of them! Full sun with blue sky: Intense & consistent medium blue. Light cloud or softer daylight: S lightly muted blue. Overcast conditions: Darker, subdued blue. Very shallow areas (steps/seats): Lighter blue, the water can even look very clear.

The deeper areas of the pool maintain a consistent blue tone, while shallower areas appear lighter. Steps and seats show how less water depth can brighten the surface colour.

Why does a medium blue pool interior look more evenly coloured?

Water naturally filters light toward blue.
A medium blue surface reflects blue wavelengths back immediately.
There’s less colour “correction” happening compared to white or dark surfaces.
Because the reflected colour and water colour align, depth changes are visually reduced this makes the pool look evenly blue across most of its depth.
Very shallow water has less light absorption.
More of the surface colour shows through directly.
Steps and ledges appear lighter or slightly different in tone.

Light Blue | Baby Blue | Pool Interior

What colour is the water of a baby blue pool interior? Full sun with blue sky: Light blue to soft aqua, sparkles when water is moving. Light cloud or softer daylight: Pale blue. Overcast conditions: Muted blue-grey. Very shallow areas (steps/seats): Very light blue, close to clear.

This swimming pool has Mid-blue waterline tiles with a Light Blue pebble interior.

Deeper areas of the pool appear a slightly more intense hue of blue, while shallower areas look lighter blue. Steps and seating show how reduced water depth brightens the surface colour.

Why do the deeper areas look darker?

Water absorbs more light as depth increases, making deeper areas appear darker.
Blue wavelengths travel further through water than other colours.
A baby blue surface already reflects blue light efficiently.
As depth increases, less light returns to the eye, deepening the blue tone.
Shallow water absorbs less light, allowing more surface colour to show through.
Steps and ledges appear lighter because the water layer is thinner.

A baby blue surface behaves similarly to white because pool water colour is created by light absorption and reflection, not by the surface colour itself. How light or dark the surface is, along with sky and lighting conditions, determines how the water appears.

Black | Charcoal | Pool Interior

What colour does the water look in a black surface swimming pool? In full sun with blue sky: It can be a deep navy / dark blue / subtle turquoise. With trees or greenery nearby: Dark green-teal. Overcast, late in the day or under shade: Near-black or charcoal.

This swimming pool features black waterline tiles with a charcoal-to-black interior.

Similar to darker blue interiors, depth plays a smaller role in black pool interiors, resulting in a more evenly distributed water colour across the pool.

Why does pool water look more evenly coloured with a black interior?

A black interior absorbs most incoming light instead of reflecting it.
Very little light is reflected back through the water.
Because less light returns to the eye, colour variation is reduced.
Depth differences have a smaller visual effect on water colour.
Both shallow and deep areas appear similarly dark.
Reflections from the sky and surroundings become more noticeable than surface colour.

This also explains why pool water appears more evenly coloured for all dark style interiors.

Why can pool water in black-interior pools appear green on some days and blue on others?

Black interiors absorb most light instead of reflecting colour.
With little surface colour returning, reflected sky and surroundings dominate.
Green light from trees, grass, and landscaping can shift the water toward green.
Blue light from clear skies strengthens blue tones.
Sun angle and cloud cover change light colour and intensity.
This makes black-interior pool water colour more sensitive to environmental conditions.

Grey Pool Interior

What colour is the water of a medium grey pool surface? Full sun with blue sky: Dark aqua to muted turquoise. Light cloud or softer daylight: Deeper aqua with grey undertone. Overcast conditions: Subdued blue-green / slate aqua. Very shallow areas (steps/seats): Lighter aqua where the surface shows through.

This swimming pool has Stonehenge Grey waterline tiles with a Grey pebble interior.

Deeper areas of the pool appear a slightly darker blue, while shallower areas look lighter. Steps and seating show how reduced water depth brightens the surface colour.

What does pool water colour look like in a grey swimming pool?

Grey interiors reflect more light back through the water than a black surface, but there is similarities. (Depending on how dark or light the tone of grey is.)
This reflected light strengthens the colour already created by the water.
Water naturally favours blue and green wavelengths.
The combination of blue and green produces subtle aqua or turquoise tones.
Because grey is neutral, it does not add its own colour.
Reflection remains controlled, so colour appears evenly distributed.
Depth changes are subtle, similar to black interiors.
The result is richer, more vibrant water colour than black, without strong gradients.
Typically the colour is a subtle hue of Aqua or Turquoise.

Beach sand | Cream | Beige Pool Interior

What colour does the water look like in a beach sand / beige pool interior? Full sun with blue sky: Light aqua to soft turquoise, often with a sparkling appearance. With surrounding greenery: Green-aqua / sea-glass tones. Overcast or late in the day: Muted green-blue, softer and less vibrant.

This swimming pool features jade green waterline tiles with a beach-coloured interior.

Why does water colour vary more with depth in a beach sand / beige pool interior?

Light, warm surfaces reflect more light back through the water.
Water filters light toward blue and green wavelengths.
As depth increases, more light is absorbed, deepening the aqua tone.
Shallow areas absorb less light, appearing lighter and warmer.
The result is a visible depth gradient rather than an even colour Because beach-coloured interiors are light and warm in tone, water depth plays a more noticeable role, creating lighter shallow areas and richer aqua tones as depth increases.

This also occurs in most light / bright coloured pools, like Light Blue and White.

Pacific Blue (Medium Blue) Pool Interior

What colour does the water look like in a Pacific blue pool interior? Full sun with blue sky: C lean, medium blue with a soft aqua tone. With surrounding greenery: Blue remains dominant with a very subtle hint of green aqua. Overcast or late in the day: Slightly deeper, muted blue.

This swimming pool features an Aqua blue waterline tile with a Pacific medium blue interior.

Because Pacific blue interiors closely align with the way water naturally appears, depth plays a smaller role, resulting in a more even water colour across the pool.

Skye Blue (Medium Blue) Pool Interior

What colour does the water look like with a Skye blue swimming pool interior? Full sun with blue sky: C lean, medium blue. With surrounding greenery: Blue remains dominant with a very subtle hint of green aqua. Overcast or late in the day: Slightly deeper, muted blue.

This swimming pool features a Mediterranean blue waterline tile with a Skye blue interior. The above Pebble and Tile samples would give you the same water colour like in the interior of this image.

Because Pacific blue interiors closely align with the way water naturally appears, depth plays a smaller role, resulting in a more even water colour across the pool.

Light Grey Pool Interior

What colour is the water with a light grey pool interior? Full sun with blue sky: Bright light blue to soft aqua, similar to white but with slightly more intensity. With surrounding greenery: Blue remains dominant with a subtle aqua tint. Overcast or late in the day: Muted blue-grey

This swimming pool features a Druid waterline tile with a Light Grey interior.

Because Light Grey interiors closely aligns with the way white appears, depth plays a bigger role, resulting in a more intense colour across the pool depths.

Gold | Brown | Classic Pebble Pool Interior

What colour does the water look like in a gold pool interior? Full sun with blue sky: Light green-aqua to soft turquoise. With surrounding greenery: Stronger green-aqua / turquoise tones. Overcast or late in the day: Muted olive-aqua / soft green.

This swimming pool features Emerald green waterline tiles with a gold/brown-coloured interior.

Because gold-toned interiors are warm and reflective, water depth plays a noticeable role, producing lighter tones in shallow areas and richer green-aqua colours as depth increases.

Remember: The colour of your waterline tiles can subtly influence how your pool water appears. Light interiors reflect a lot of light, so colours near the waterline are reflected back into the water. For example, blue waterline tiles paired with a bright white interior can enhance blue tones. Green waterline tiles with the same white interior can introduce a slight aqua or green-blue shift.

Why pool water never looks the same colour as the surface

Pool water itself has no colour. Water absorbs light, it does not reflect colour the way a solid surface does.
Red and warm light wavelengths are absorbed first as light travels through water.
Blue wavelengths travel further, which is why water tends to appear blue.
The pool interior reflects light back through the water, influencing the final colour.
Water depth increases colour intensity and darkens appearance.
Sunlight angle and brightness change how strong the colour appears.
Surroundings and reflections also subtly affect what the eye sees.

What colour should I choose for my swimming pool?

One of the first questions pool owners ask is “what colour will my pool water actually look like?” While pool surfaces come in many colours, water itself has no colour — what you see is the result of light, depth, and how the pool interior reflects and absorbs that light, which is why what is surrounding the swimming pool is also important. In simple terms, pool water naturally appears blue because longer light wavelengths are absorbed as light travels through water. The interior surface then reflects light back through the water, influencing whether the final appearance looks lighter, darker, greener, or more turquoise. This is why: – Light interiors produce brighter, lighter blue water – Dark interiors create deeper, more even water colour – Warm tones shift water toward aqua or green – Pool Depth, sky colour, surroundings, and sunlight all change the final look & what it looks like in winter may be totally different to what you see in summer. So in reality you should be asking “what colour water should I choose for my swimming pool?”, the real answer depends on how the surface colour interacts with water, what is surrounding the pool & not just the colour samples you have to choose from.

Pool Water Colour Explained — Why Your Pool Water Looks That Way