CSS named colour

Dark Slate Blue

#483d8b

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

RGB: rgb(72 61 139)
HSL: 248°, 39%, 39%
OKLCh: 41.4% 0.125 286.0

Dark Slate Blue in every format

Web & CSSThe everyday formats for stylesheets and design tools.

Hex	`#483d8b`
RGB	`rgb(72 61 139)`
RGB legacy	`rgb(72, 61, 139)`
RGB percent	`rgb(28.24% 23.92% 54.51%)`
HSL	`hsl(248.5 39% 39.2%)`
HSL legacy	`hsl(248.5, 39%, 39.2%)`
HSV / HSB	`hsv(248.5, 56.1%, 54.5%)`
HWB	`hwb(248.5 23.9% 45.5%)`
Nearest name	`darkslateblue`
CMYK	`cmyk(48.2%, 56.1%, 0%, 45.5%)`Naive conversion. Real print work needs an ICC profile.

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

OKLCh	`oklch(41.434% 0.12484 286.039)`Modern CSS colour space for even palettes — better than HSL when building scales.
OKLab	`oklab(41.434% 0.03449 -0.11998)`
CIE LCh	`lch(30.284% 47.807 296.61)`
CIE Lab	`lab(30.284% 21.413 -42.744)`
Display P3	`color(display-p3 0.2753 0.2408 0.5267)`
Rec. 2020	`color(rec2020 0.2269 0.1871 0.4752)`
srgb-linear	`color(srgb-linear 0.0648 0.0467 0.2582)`Light-linear sRGB — the same numbers a shader wants for maths.
CIE XYZ (D65)	`color(xyz-d65 0.09 0.0658 0.2522)`

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

GLSL vec3 — sRGB	`vec3(0.282, 0.239, 0.545)`Encoded values. Use when writing straight to the framebuffer.
GLSL vec3 — linear	`vec3(0.065, 0.047, 0.258)`Light-linear values. Use for lighting, blending and mixing.
GLSL vec4 — sRGB	`vec4(0.282, 0.239, 0.545, 1.0)`
GLSL vec4 — linear	`vec4(0.065, 0.047, 0.258, 1.0)`
GLSL ivec3	`ivec3(72, 61, 139)`
HLSL float3 — sRGB	`float3(0.282, 0.239, 0.545)`
HLSL float3 — linear	`float3(0.065, 0.047, 0.258)`
HLSL float4 — sRGB	`float4(0.282, 0.239, 0.545, 1.0)`
HLSL half4 — sRGB	`half4(0.282, 0.239, 0.545, 1.0)`
WGSL vec3f — sRGB	`vec3f(0.282, 0.239, 0.545)`
WGSL vec4f — sRGB	`vec4f(0.282, 0.239, 0.545, 1.0)`
WGSL vec3<f32> — linear	`vec3<f32>(0.065, 0.047, 0.258)`

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

Unity Color	`new Color(0.282f, 0.239f, 0.545f, 1.0f)`Color for everyday scripting (0–1). Color32 when you need whole numbers from 0 to 255.
Unity Color32	`new Color32(72, 61, 139, 255)`
Unreal FLinearColor	`FLinearColor(0.0648f, 0.0467f, 0.2582f, 1.0f)`FLinearColor for materials and lighting. FColor when you need whole numbers from 0 to 255.
Unreal FColor	`FColor(72, 61, 139, 255)`Whole numbers from 0 to 255 — use when an API asks for FColor, not FLinearColor.
Godot Color	`Color(0.282, 0.239, 0.545, 1)`
Flutter Color	`Color(0xFF483D8B)`Packed ARGB, so alpha comes first.
Android Color	`Color.rgb(72, 61, 139)`
SwiftUI Color	`Color(red: 0.282, green: 0.239, blue: 0.545)`
UIKit UIColor	`UIColor(red: 0.282, green: 0.239, blue: 0.545, alpha: 1)`

Raw valuesPacked integers and plain arrays.

0x hex	`0x483D8B`
0x hex (ARGB)	`0xFF483D8B`
Array 0–1	`[0.282, 0.239, 0.545]`
Array 0–255	`[72, 61, 139]`
Decimal integer	`4734347`

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
Dark Slate Blue on white	9.07:1	AAA	Lc 91	Body text at any size
Dark Slate Blue on black	2.32:1	Fail	Lc 12	Not usable for text

Dark Slate Blue text on a white background

Dark Slate Blue text on a black background

White text on Dark Slate Blue

Black text on Dark Slate Blue

Tonal scale

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

50#f5f5ff
100#eaeaff
200#d7d6ff
300#bfbbff
400#a39df2
500#857fd3
600#6d65b4
700#574f97
800#443c7e
900#352d68
950#1e1644

Tints and shades

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

Tint 1#625c9f
Tint 2#7f7cb3
Tint 3#9d9bc6
Tint 4#bcbcda
Tint 5#ddddec
Shade 1#362e6c
Shade 2#261f4e
Shade 3#161232
Shade 4#080619
Shade 5#010104

Colours that work with Dark Slate Blue

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

#544e00
#7f2f00
#005d3d
#134a8d
#653178

Closest CSS names

darkslateblueexact match
rebeccapurpleΔEok 0.061
indigoΔEok 0.101
darkslategrayΔEok 0.131
midnightblueΔEok 0.131
purpleΔEok 0.132