CSS named colour

Sky Blue

#87ceeb

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

RGB: rgb(135 206 235)
HSL: 197°, 71%, 73%
OKLCh: 81.5% 0.082 225.8

Sky Blue in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#87ceeb`
RGB	`rgb(135 206 235)`
RGB legacy	`rgb(135, 206, 235)`
RGB percent	`rgb(52.94% 80.78% 92.16%)`
HSL	`hsl(197.4 71.4% 72.5%)`
HSL legacy	`hsl(197.4, 71.4%, 72.5%)`
HSV / HSB	`hsv(197.4, 42.6%, 92.2%)`
HWB	`hwb(197.4 52.9% 7.8%)`
Nearest name	`skyblue`
CMYK	`cmyk(42.6%, 12.3%, 0%, 7.8%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(81.482% 0.08192 225.754)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(81.482% -0.05716 -0.05868)`
CIE LCh	`lch(78.853% 27.973 231.172)`
CIE Lab	`lab(78.853% -17.539 -21.792)`
Display P3	`color(display-p3 0.5916 0.8006 0.909)`
Rec. 2020	`color(rec2020 0.6213 0.7701 0.8963)`
srgb-linear	`color(srgb-linear 0.2423 0.6172 0.8308)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.4706 0.5529 0.8679)`

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

GLSL vec3 — sRGB	`vec3(0.529, 0.808, 0.922)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.242, 0.617, 0.831)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.529, 0.808, 0.922, 1.0)`
GLSL vec4 — linear	`vec4(0.242, 0.617, 0.831, 1.0)`
GLSL ivec3	`ivec3(135, 206, 235)`
HLSL float3 — sRGB	`float3(0.529, 0.808, 0.922)`
HLSL float3 — linear	`float3(0.242, 0.617, 0.831)`
HLSL float4 — sRGB	`float4(0.529, 0.808, 0.922, 1.0)`
HLSL half4 — sRGB	`half4(0.529, 0.808, 0.922, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.529, 0.808, 0.922)`
WGSL vec4f — sRGB	`vec4f(0.529, 0.808, 0.922, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.242, 0.617, 0.831)`

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

Unity Color	`new Color(0.529f, 0.808f, 0.922f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(135, 206, 235, 255)`
Unreal FLinearColor	`FLinearColor(0.2423f, 0.6172f, 0.8308f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(135, 206, 235, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.529, 0.808, 0.922, 1)`
Flutter Color	`Color(0xFF87CEEB)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(135, 206, 235)`
SwiftUI Color	`Color(red: 0.529, green: 0.808, blue: 0.922)`
UIKit UIColor	`UIColor(red: 0.529, green: 0.808, blue: 0.922, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x87CEEB`
0x hex (ARGB)	`0xFF87CEEB`
Array 0–1	`[0.529, 0.808, 0.922]`
Array 0–255	`[135, 206, 235]`
Decimal integer	`8900331`

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
Sky Blue on white	1.74:1	Fail	Lc 32	Non-text elements only
Sky Blue on black	12.06:1	AAA	Lc 71	Headings and large text

Sky Blue text on a white background

Sky Blue text on a black background

White text on Sky Blue

Black text on Sky Blue

Tonal scale

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

50#dbfeff
100#c2f7ff
200#ace7ff
300#91d0ea
400#70b4cf
500#4f96b1
600#367b95
700#21637b
800#0f4f64
900#003e51
950#002433

Tints and shades

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

Tint 1#9cd6ef
Tint 2#b1dff2
Tint 3#c5e7f5
Tint 4#d8eff9
Tint 5#ecf7fc
Shade 1#69a1b8
Shade 2#4c7788
Shade 3#314e5b
Shade 4#182a31
Shade 5#04090c

Colours that work with Sky Blue

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

#f0b296
#eaadce
#c9c688
#7fd3d3
#a0c5f7

Closest CSS names

skyblueexact match
lightskyblueΔEok 0.022
lightsteelblueΔEok 0.049
lightblueΔEok 0.053
powderblueΔEok 0.072
mediumturquoiseΔEok 0.072