CSS named colour

Steel Blue

#4682b4

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

RGB: rgb(70 130 180)
HSL: 207°, 44%, 49%
OKLCh: 58.8% 0.099 245.7

Steel Blue in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#4682b4`
RGB	`rgb(70 130 180)`
RGB legacy	`rgb(70, 130, 180)`
RGB percent	`rgb(27.45% 50.98% 70.59%)`
HSL	`hsl(207.3 44% 49%)`
HSL legacy	`hsl(207.3, 44%, 49%)`
HSV / HSB	`hsv(207.3, 61.1%, 70.6%)`
HWB	`hwb(207.3 27.5% 29.4%)`
Nearest name	`steelblue`
CMYK	`cmyk(61.1%, 27.8%, 0%, 29.4%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(58.8% 0.09934 245.739)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(58.8% -0.04082 -0.09057)`
CIE LCh	`lch(51.987% 33.881 255.712)`
CIE Lab	`lab(51.987% -8.362 -32.833)`
Display P3	`color(display-p3 0.3318 0.5041 0.6892)`
Rec. 2020	`color(rec2020 0.3422 0.4508 0.6522)`
srgb-linear	`color(srgb-linear 0.0612 0.2232 0.4564)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.1875 0.2056 0.4616)`

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

GLSL vec3 — sRGB	`vec3(0.275, 0.51, 0.706)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.061, 0.223, 0.456)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.275, 0.51, 0.706, 1.0)`
GLSL vec4 — linear	`vec4(0.061, 0.223, 0.456, 1.0)`
GLSL ivec3	`ivec3(70, 130, 180)`
HLSL float3 — sRGB	`float3(0.275, 0.51, 0.706)`
HLSL float3 — linear	`float3(0.061, 0.223, 0.456)`
HLSL float4 — sRGB	`float4(0.275, 0.51, 0.706, 1.0)`
HLSL half4 — sRGB	`half4(0.275, 0.51, 0.706, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.275, 0.51, 0.706)`
WGSL vec4f — sRGB	`vec4f(0.275, 0.51, 0.706, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.061, 0.223, 0.456)`

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

Unity Color	`new Color(0.275f, 0.51f, 0.706f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(70, 130, 180, 255)`
Unreal FLinearColor	`FLinearColor(0.0612f, 0.2232f, 0.4564f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(70, 130, 180, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.275, 0.51, 0.706, 1)`
Flutter Color	`Color(0xFF4682B4)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(70, 130, 180)`
SwiftUI Color	`Color(red: 0.275, green: 0.51, blue: 0.706)`
UIKit UIColor	`UIColor(red: 0.275, green: 0.51, blue: 0.706, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x4682B4`
0x hex (ARGB)	`0xFF4682B4`
Array 0–1	`[0.275, 0.51, 0.706]`
Array 0–255	`[70, 130, 180]`
Decimal integer	`4620980`

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
Steel Blue on white	4.11:1	AA Large	Lc 68	Headings and large text
Steel Blue on black	5.11:1	AA	Lc 34	Non-text elements only

Steel Blue text on a white background

Steel Blue text on a black background

White text on Steel Blue

Black text on Steel Blue

Tonal scale

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

50#e6faff
100#d3f2ff
200#b3e2ff
300#95ccfd
400#75afe2
500#5591c4
600#3d77a6
700#295f8b
800#184b72
900#0a3b5e
950#00213c

Tints and shades

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

Tint 1#6696c1
Tint 2#84abce
Tint 3#a2c0da
Tint 4#c1d5e7
Tint 5#e0eaf3
Shade 1#35658c
Shade 2#254967
Shade 3#152f44
Shade 4#071623
Shade 5#010307

Colours that work with Steel Blue

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

#a57037
#ae6274
#6e8742
#188ba2
#6c77b7

Closest CSS names

steelblueexact match
slategrayΔEok 0.069
lightslategrayΔEok 0.074
darkcyanΔEok 0.086
tealΔEok 0.094
grayΔEok 0.100