CSS named colour

Turquoise

#40e0d0

A CSS named colour: turquoise is valid anywhere a colour is expected.

RGB: rgb(64 224 208)
HSL: 174°, 72%, 56%
OKLCh: 82.2% 0.131 185.1

Turquoise in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#40e0d0`
RGB	`rgb(64 224 208)`
RGB legacy	`rgb(64, 224, 208)`
RGB percent	`rgb(25.1% 87.84% 81.57%)`
HSL	`hsl(174 72.1% 56.5%)`
HSL legacy	`hsl(174, 72.1%, 56.5%)`
HSV / HSB	`hsv(174, 71.4%, 87.8%)`
HWB	`hwb(174 25.1% 12.2%)`
Nearest name	`turquoise`
CMYK	`cmyk(71.4%, 0%, 7.1%, 12.2%)`Naive conversion. Real print work needs an ICC profile.

Perceptual & wide gamutModern CSS colour spaces for uniform scales and P3 displays.

OKLCh	`oklch(82.233% 0.13074 185.089)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(82.233% -0.13023 -0.0116)`
CIE LCh	`lch(80.961% 45.378 185.922)`
CIE Lab	`lab(80.961% -45.136 -4.682)`
Display P3	`color(display-p3 0.4547 0.8663 0.8148)`
Rec. 2020	`color(rec2020 0.5449 0.8347 0.7945)`
srgb-linear	`color(srgb-linear 0.0513 0.7454 0.6308)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.4015 0.5895 0.6894)`

ShadersGLSL, HLSL and WGSL vectors in both encoded and linear form.

GLSL vec3 — sRGB	`vec3(0.251, 0.878, 0.816)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.051, 0.745, 0.631)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.251, 0.878, 0.816, 1.0)`
GLSL vec4 — linear	`vec4(0.051, 0.745, 0.631, 1.0)`
GLSL ivec3	`ivec3(64, 224, 208)`
HLSL float3 — sRGB	`float3(0.251, 0.878, 0.816)`
HLSL float3 — linear	`float3(0.051, 0.745, 0.631)`
HLSL float4 — sRGB	`float4(0.251, 0.878, 0.816, 1.0)`
HLSL half4 — sRGB	`half4(0.251, 0.878, 0.816, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.251, 0.878, 0.816)`
WGSL vec4f — sRGB	`vec4f(0.251, 0.878, 0.816, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.051, 0.745, 0.631)`

Engines & appsConstructors for Unity, Unreal, Godot, Flutter, SwiftUI and Android.

Unity Color	`new Color(0.251f, 0.878f, 0.816f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(64, 224, 208, 255)`
Unreal FLinearColor	`FLinearColor(0.0513f, 0.7454f, 0.6308f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(64, 224, 208, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.251, 0.878, 0.816, 1)`
Flutter Color	`Color(0xFF40E0D0)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(64, 224, 208)`
SwiftUI Color	`Color(red: 0.251, green: 0.878, blue: 0.816)`
UIKit UIColor	`UIColor(red: 0.251, green: 0.878, blue: 0.816, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x40E0D0`
0x hex (ARGB)	`0xFF40E0D0`
Array 0–1	`[0.251, 0.878, 0.816]`
Array 0–255	`[64, 224, 208]`
Decimal integer	`4251856`

Contrast and accessibility

WCAG 2 ratios are what audits and legislation reference. APCA is shown alongside because WCAG 2 is known to misjudge mid-tone backgrounds, and it is the basis of the WCAG 3 draft.

Pairing	WCAG 2 ratio	Level	APCA	Suitable for
Turquoise on white	1.64:1	Fail	Lc 28	Not usable for text
Turquoise on black	12.79:1	AAA	Lc 75	Headings and large text

Turquoise text on a white background

Turquoise text on a black background

White text on Turquoise

Black text on Turquoise

Tonal scale

Hue held fixed while lightness walks OKLCh, ready to use as a design system ramp.

50#c7fffd
100#99fff6
200#7ff4e6
300#5aded0
400#19c2b4
500#00a496
600#00877b
700#006d62
800#00574e
900#00443d
950#002823

Tints and shades

Mixed perceptually toward white and black, so the steps feel evenly spaced.

Tint 1#70e6d8
Tint 2#93ebdf
Tint 3#b1f0e7
Tint 4#ccf6ef
Tint 5#e6faf7
Shade 1#30afa3
Shade 2#218178
Shade 3#13564f
Shade 4#062e2a
Shade 5#010b0a

Colours that work with Turquoise

Complementary, triadic and analogous partners, rotated in OKLCh so they keep the same apparent brightness.

#ffa0b9
#d9afff
#ffb263
#79de9f
#40dafa

Closest CSS names

turquoiseexact match
mediumturquoiseΔEok 0.041
darkturquoiseΔEok 0.057
mediumaquamarineΔEok 0.061
skyblueΔEok 0.087
cyanΔEok 0.090