Colour reference

Sky 500

#0ea5e9

RGB: rgb(14 165 233)
HSL: 199°, 89%, 48%
OKLCh: 68.5% 0.148 237.3

Sky 500 in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#0ea5e9`
RGB	`rgb(14 165 233)`
RGB legacy	`rgb(14, 165, 233)`
RGB percent	`rgb(5.49% 64.71% 91.37%)`
HSL	`hsl(198.6 88.7% 48.4%)`
HSL legacy	`hsl(198.6, 88.7%, 48.4%)`
HSV / HSB	`hsv(198.6, 94%, 91.4%)`
HWB	`hwb(198.6 5.5% 8.6%)`
Nearest name	`cornflowerblue (approx.)`
CMYK	`cmyk(94%, 29.2%, 0%, 8.6%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(68.469% 0.14787 237.323)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(68.469% -0.07984 -0.12446)`
CIE LCh	`lch(63.352% 48.195 248.571)`
CIE Lab	`lab(63.352% -17.608 -44.863)`
Display P3	`color(display-p3 0.2942 0.6374 0.8908)`
Rec. 2020	`color(rec2020 0.3852 0.591 0.874)`
srgb-linear	`color(srgb-linear 0.0044 0.3763 0.8148)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.2834 0.3289 0.8195)`

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

GLSL vec3 — sRGB	`vec3(0.055, 0.647, 0.914)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.004, 0.376, 0.815)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.055, 0.647, 0.914, 1.0)`
GLSL vec4 — linear	`vec4(0.004, 0.376, 0.815, 1.0)`
GLSL ivec3	`ivec3(14, 165, 233)`
HLSL float3 — sRGB	`float3(0.055, 0.647, 0.914)`
HLSL float3 — linear	`float3(0.004, 0.376, 0.815)`
HLSL float4 — sRGB	`float4(0.055, 0.647, 0.914, 1.0)`
HLSL half4 — sRGB	`half4(0.055, 0.647, 0.914, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.055, 0.647, 0.914)`
WGSL vec4f — sRGB	`vec4f(0.055, 0.647, 0.914, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.004, 0.376, 0.815)`

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

Unity Color	`new Color(0.055f, 0.647f, 0.914f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(14, 165, 233, 255)`
Unreal FLinearColor	`FLinearColor(0.0044f, 0.3763f, 0.8148f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(14, 165, 233, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.055, 0.647, 0.914, 1)`
Flutter Color	`Color(0xFF0EA5E9)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(14, 165, 233)`
SwiftUI Color	`Color(red: 0.055, green: 0.647, blue: 0.914)`
UIKit UIColor	`UIColor(red: 0.055, green: 0.647, blue: 0.914, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x0EA5E9`
0x hex (ARGB)	`0xFF0EA5E9`
Array 0–1	`[0.055, 0.647, 0.914]`
Array 0–255	`[14, 165, 233]`
Decimal integer	`959977`

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 500 on white	2.77:1	Fail	Lc 53	Large headings only
Sky 500 on black	7.58:1	AAA	Lc 49	Large headings only

Sky 500 text on a white background

Sky 500 text on a black background

White text on Sky 500

Black text on Sky 500

Tonal scale

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

50#e2fcff
100#cdf4ff
200#a8e5ff
300#6fd1ff
400#39b5f7
500#0096d9
600#007bba
700#006299
800#004e7d
900#003d65
950#00233f

Tints and shades

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

Tint 1#53b5ee
Tint 2#7bc4f2
Tint 3#9ed3f6
Tint 4#bfe2fa
Tint 5#dff1fd
Shade 1#0881b7
Shade 2#045e87
Shade 3#023d5a
Shade 4#011f31
Shade 5#00060c

Colours that work with Sky 500

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

#dc7f2b
#e06f9a
#93a522
#00b0c5
#7194f5

Closest CSS names

cornflowerblueΔEok 0.061
dodgerblueΔEok 0.071
deepskyblueΔEok 0.072
cadetblueΔEok 0.109
steelblueΔEok 0.110
lightseagreenΔEok 0.112