Colour reference

Blue Munsell

#118ab2

RGB: rgb(17 138 178)
HSL: 195°, 83%, 38%
OKLCh: 59.2% 0.112 228.0

Blue Munsell in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#118ab2`
RGB	`rgb(17 138 178)`
RGB legacy	`rgb(17, 138, 178)`
RGB percent	`rgb(6.67% 54.12% 69.8%)`
HSL	`hsl(194.9 82.6% 38.2%)`
HSL legacy	`hsl(194.9, 82.6%, 38.2%)`
HSV / HSB	`hsv(194.9, 90.4%, 69.8%)`
HWB	`hwb(194.9 6.7% 30.2%)`
Nearest name	`steelblue (approx.)`
CMYK	`cmyk(90.4%, 22.5%, 0%, 30.2%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(59.228% 0.11201 227.973)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(59.228% -0.07499 -0.0832)`
CIE LCh	`lch(52.997% 36.47 236.062)`
CIE Lab	`lab(52.997% -20.361 -30.257)`
Display P3	`color(display-p3 0.2471 0.533 0.6828)`
Rec. 2020	`color(rec2020 0.3019 0.4782 0.6457)`
srgb-linear	`color(srgb-linear 0.0056 0.2542 0.4452)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.1735 0.2151 0.4536)`

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

GLSL vec3 — sRGB	`vec3(0.067, 0.541, 0.698)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.006, 0.254, 0.445)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.067, 0.541, 0.698, 1.0)`
GLSL vec4 — linear	`vec4(0.006, 0.254, 0.445, 1.0)`
GLSL ivec3	`ivec3(17, 138, 178)`
HLSL float3 — sRGB	`float3(0.067, 0.541, 0.698)`
HLSL float3 — linear	`float3(0.006, 0.254, 0.445)`
HLSL float4 — sRGB	`float4(0.067, 0.541, 0.698, 1.0)`
HLSL half4 — sRGB	`half4(0.067, 0.541, 0.698, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.067, 0.541, 0.698)`
WGSL vec4f — sRGB	`vec4f(0.067, 0.541, 0.698, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.006, 0.254, 0.445)`

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

Unity Color	`new Color(0.067f, 0.541f, 0.698f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(17, 138, 178, 255)`
Unreal FLinearColor	`FLinearColor(0.0056f, 0.2542f, 0.4452f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(17, 138, 178, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.067, 0.541, 0.698, 1)`
Flutter Color	`Color(0xFF118AB2)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(17, 138, 178)`
SwiftUI Color	`Color(red: 0.067, green: 0.541, blue: 0.698)`
UIKit UIColor	`UIColor(red: 0.067, green: 0.541, blue: 0.698, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x118AB2`
0x hex (ARGB)	`0xFF118AB2`
Array 0–1	`[0.067, 0.541, 0.698]`
Array 0–255	`[17, 138, 178]`
Decimal integer	`1149618`

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
Blue Munsell on white	3.96:1	AA Large	Lc 66	Headings and large text
Blue Munsell on black	5.30:1	AA	Lc 35	Non-text elements only

Blue Munsell text on a white background

Blue Munsell text on a black background

White text on Blue Munsell

Black text on Blue Munsell

Tonal scale

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

50#dcfeff
100#c5f6ff
200#99e9ff
300#7ad3f9
400#55b6df
500#2a98c0
600#007da3
700#006588
800#005070
900#003f5c
950#002439

Tints and shades

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

Tint 1#4c9dbf
Tint 2#73b1cc
Tint 3#97c4d9
Tint 4#bad8e6
Tint 5#dcebf3
Shade 1#0b6b8b
Shade 2#054e66
Shade 3#023243
Shade 4#011823
Shade 5#000407

Colours that work with Blue Munsell

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

#b3673f
#ae618a
#858226
#009196
#527fc0

Closest CSS names

steelblueΔEok 0.035
darkcyanΔEok 0.064
tealΔEok 0.079
slategrayΔEok 0.084
lightslategrayΔEok 0.087
cadetblueΔEok 0.092