CSS named color

Dark Slate Blue #483D8B

The CSS keyword darkslateblue is #483D8B. It is a dark soft violet in the violet family. In OKLCH it sits at lightness 0.414, chroma 0.125 and hue 286.0°.

Relative luminance: 0.0658
OKLCH L · C · h: 0.414 · 0.125 · 286.0
Best text: White 9.06:1
Hue family: Violet

Inspect this color Check contrast

#483D8B color codes

HEX: #483D8B
RGB: rgb(72, 61, 139)
HSL: hsl(248, 39%, 39%)
OKLCH: oklch(0.414 0.125 286.0)
OKLab: oklab(0.414 0.034 -0.120)
CIELAB (D65): L* 30.83, a* 26.05, b* -42.08
XYZ (D65): X 9.00, Y 6.58, Z 25.22
CMYK (naive): cmyk(48%, 56%, 0%, 45%)

CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.

Legibility

Contrast: is #483D8B accessible?

White text on it reaches 9.06:1, passing AAA. Black text fails at 2.31:1.

WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.

Open the Contrast System

Black text on it

2.31:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +13
White text on it

9.06:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −95
As text on black

2.31:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −11
As text on white

9.06:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +90

Nearest versions that pass 4.5:1

For text on white

#483D8B 9.06:1

It already reaches 9.06:1 on white, so no change is needed.
For text on black

#726ABD 4.51:1

Lightening its OKLCH lightness from 0.41 to 0.57 reaches 4.51:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #483D8B live

Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.

The studio needs JavaScript.

Scale

Shades and tints of #483D8B

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #483D8B sits at step 800.

50#F4F4FF

White
1.09
Black
19.23
100#E9E9FF

White
1.19
Black
17.56
200#D3D2FF

White
1.45
Black
14.43
300#B8B4FF

White
1.90
Black
11.01
400#9B95EA

White
2.66
Black
7.88
500#8179CD

White
3.78
Black
5.54
600#6A62B3

White
5.23
Black
4.01
700#544B98

White
7.40
Black
2.83
800This color#483D8B

White
9.06
Black
2.31
900#271C59

White
15.03
Black
1.39
950#16083D

White
18.48
Black
1.13

Under each step, white and black text on it; a bold figure passes 4.5:1.

Gamut

How vivid #483D8B can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.241; #483D8B uses 52% of it. Display P3, which many recent phones and laptops show, reaches 0.246 there: 2% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.125
sRGB edge: 0.241
Display P3 edge: 0.246
Rec. 2020 edge: 0.266
Dominant wavelength: 458 nm
Excitation purity: 56%
Chromaticity: x 0.2206, y 0.1613

This color#483D8B
Most vivid in sRGB#4E00C4
Most vivid in Display P3oklch(0.414 0.246 286.0)

On a screen without Display P3 the last tile shows the sRGB edge instead.

Use the wider color where screens show it

.accent {
  color: #483d8b;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.2783 0 0.7462); }
}

Mixing

Mixing #483D8B

Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.

White #FFFFFF

sRGB50%#A49EC5
OKLab50%#9D9BC6
OKLCH50%#9D9BC6

Black #000000

sRGB50%#241F46
OKLab50%#161232
OKLCH50%#161232

Its complement #524E00

sRGB50%#4D4646
OKLab50%#4A4A55
OKLCH50%#005758

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #483d8b, white);
color: color-mix(in oklch, #483d8b 50%, white);

In use

#483D8B in an interface

A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.

Light page

Button labelText, 4.5:19.06:1 Passes
Link and body-size textText, 4.5:19.06:1 Passes
Large headingLarge text, 3:19.06:1 Passes
Icons, borders and focus ringsNon-text, 3:19.06:1 Passes

Dark page

Button labelText, 4.5:19.06:1 Passes
Link and body-size textText, 4.5:12.06:1 Fails
Large headingLarge text, 3:12.06:1 Fails
Icons, borders and focus ringsNon-text, 3:12.06:1 Fails

For text on this page, the nearest shade that passes is #7B73C7 4.56:1

Color vision

How #483D8B looks with color blindness

Achromatopsia changes it most, ΔE2000 23.9; deuteranopia changes it least, 10.9.

Simulated with Machado et al. (2009) at full severity, in linear light.

Simulate a whole page What each type sees

Protanopia

No working red (long-wavelength) cones

#124B8E ΔE2000 11.7

Distinct

Reads as dark soft blue
Deuteranopia

No working green (medium-wavelength) cones

#104689 ΔE2000 10.9

Distinct

Reads as dark soft blue
Tritanopia

No working blue (short-wavelength) cones

#324E5E ΔE2000 12.0

Distinct

Reads as dark grayish blue
Achromatopsia

No cone color vision; lightness only

#494949 ΔE2000 23.9

Distinct

Reads as dark gray

Pairing check

Checked against its complement, #524E00. Their lightness contrast is only 1.05:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#483D8B · #524E00	54.2	Stays distinct
Protanopia	#124B8E · #564B00	48.0	Stays distinct
Deuteranopia	#104689 · #584D07	47.7	Stays distinct
Tritanopia	#324E5E · #594841	21.9	Stays distinct
Achromatopsia	#494949 · #4C4C4C	1.0	Easily confused

Harmony

Color harmonies for #483D8B

Its complement is #524E00, a dark muted yellow.

Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.

Open the Harmony Studio

Base#483D8B
Complement#524E00

Complementary

Open in Harmony Studio

−30°#134A8D
Base#483D8B
+30°#653178

Analogous

Open in Harmony Studio

Base#483D8B
+120°#7C3200
+240°#005A41

Triadic

Open in Harmony Studio

Base#483D8B
+150°#664400
+210°#285900

Split-complementary

Open in Harmony Studio

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-darkslateblue: #483d8b;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        darkslateblue: '#483d8b',
      },
    },
  },
};

Tailwind v4 theme

/* app.css — Tailwind CSS v4 */
@import "tailwindcss";

@theme {
  --color-darkslateblue: oklch(0.414 0.125 286.0);
}

Design token (W3C DTCG)

{
  "color": {
    "darkslateblue": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2824, 0.2392, 0.5451],
        "hex": "#483d8b"
      },
      "$description": "CSS named color darkslateblue"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let darkslateblue = Color(.sRGB, red: 0.282, green: 0.239, blue: 0.545, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Darkslateblue = Color(0xFF483D8B)
}

Matches

The nearest match in each system

The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.

Tools

Open #483D8B in the tools

Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.

Dark Slate Blue #483D8B

#483D8B color codes

Contrast: is #483D8B accessible?

Black text on it

White text on it

As text on black

As text on white

Nearest versions that pass 4.5:1

Adjust #483D8B live

Shades and tints of #483D8B

How vivid #483D8B can get

Mixing #483D8B

#483D8B in an interface

How #483D8B looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #483D8B

Complementary

Analogous

Triadic

Split-complementary

Design tokens

CSS custom property

Tailwind config

Tailwind v4 theme

Design token (W3C DTCG)

SwiftUI color

Jetpack Compose color

The nearest match in each system

Similar colors

Open #483D8B in the tools