Colour reference

Cyan 500

#06b6d4

RGB: rgb(6 182 212)
HSL: 189°, 94%, 43%
OKLCh: 71.5% 0.126 215.2

Cyan 500 in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#06b6d4`
RGB	`rgb(6 182 212)`
RGB legacy	`rgb(6, 182, 212)`
RGB percent	`rgb(2.35% 71.37% 83.14%)`
HSL	`hsl(188.7 94.5% 42.7%)`
HSL legacy	`hsl(188.7, 94.5%, 42.7%)`
HSV / HSB	`hsv(188.7, 97.2%, 83.1%)`
HWB	`hwb(188.7 2.4% 16.9%)`
Nearest name	`lightseagreen (approx.)`
CMYK	`cmyk(97.2%, 14.2%, 0%, 16.9%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(71.484% 0.12574 215.221)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(71.484% -0.10272 -0.07252)`
CIE LCh	`lch(67.7% 41.353 220.171)`
CIE Lab	`lab(67.7% -31.598 -26.676)`
Display P3	`color(display-p3 0.3219 0.703 0.8172)`
Rec. 2020	`color(rec2020 0.4135 0.6587 0.7942)`
srgb-linear	`color(srgb-linear 0.0018 0.4678 0.6584)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.2868 0.3825 0.6816)`

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

GLSL vec3 — sRGB	`vec3(0.024, 0.714, 0.831)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.002, 0.468, 0.658)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.024, 0.714, 0.831, 1.0)`
GLSL vec4 — linear	`vec4(0.002, 0.468, 0.658, 1.0)`
GLSL ivec3	`ivec3(6, 182, 212)`
HLSL float3 — sRGB	`float3(0.024, 0.714, 0.831)`
HLSL float3 — linear	`float3(0.002, 0.468, 0.658)`
HLSL float4 — sRGB	`float4(0.024, 0.714, 0.831, 1.0)`
HLSL half4 — sRGB	`half4(0.024, 0.714, 0.831, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.024, 0.714, 0.831)`
WGSL vec4f — sRGB	`vec4f(0.024, 0.714, 0.831, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.002, 0.468, 0.658)`

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

Unity Color	`new Color(0.024f, 0.714f, 0.831f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(6, 182, 212, 255)`
Unreal FLinearColor	`FLinearColor(0.0018f, 0.4678f, 0.6584f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(6, 182, 212, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.024, 0.714, 0.831, 1)`
Flutter Color	`Color(0xFF06B6D4)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(6, 182, 212)`
SwiftUI Color	`Color(red: 0.024, green: 0.714, blue: 0.831)`
UIKit UIColor	`UIColor(red: 0.024, green: 0.714, blue: 0.831, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x06B6D4`
0x hex (ARGB)	`0xFF06B6D4`
Array 0–1	`[0.024, 0.714, 0.831]`
Array 0–255	`[6, 182, 212]`
Decimal integer	`440020`

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
Cyan 500 on white	2.43:1	Fail	Lc 47	Large headings only
Cyan 500 on black	8.65:1	AAA	Lc 55	Large headings only

Cyan 500 text on a white background

Cyan 500 text on a black background

White text on Cyan 500

Black text on Cyan 500

Tonal scale

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

50#d0ffff
100#b3fbff
200#83eeff
300#60d8f4
400#2bbcd9
500#009dbb
600#00819c
700#00687f
800#005366
900#004152
950#002632

Tints and shades

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

Tint 1#56c3dc
Tint 2#7ecfe3
Tint 3#a1dbea
Tint 4#c1e7f1
Tint 5#e0f3f8
Shade 1#038ea6
Shade 2#02687a
Shade 3#014451
Shade 4#00242b
Shade 5#00070a

Colours that work with Cyan 500

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

#e6856c
#d384c2
#bba238
#01bcae
#58aaec

Closest CSS names

lightseagreenΔEok 0.060
deepskyblueΔEok 0.063
darkturquoiseΔEok 0.071
cadetblueΔEok 0.088
mediumturquoiseΔEok 0.088
skyblueΔEok 0.111