#1D3D83#1D3D83

#1D3D83 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.124 H 263.2°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D83
RGB	rgb(29, 61, 131)
HSL	hsl(221, 64%, 31%)
HSV	hsv(221, 78%, 51%)
CMYK	cmyk(77.9%, 53.4%, 0%, 48.6%)
CIE-LAB	lab(27.40, 14.97, -42.80)
CIE-LCH	lch(27.40, 45.34, 289.28°)
OKLab	oklab(37.93% -0.0146 -0.1232)
OKLCH	oklch(37.93% 0.124 263.2)
XYZ	xyz(6.2707, 5.2367, 22.1486)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D83 #83631D

analogous

#1D7083 #1D3D83 #301D83

triadic

#1D3D83 #831D3D #3D831D

tetradic

#1D3D83 #831D70 #83631D #1D8330

square

#1D3D83 #831D70 #83631D #1D8330

split-complementary

#1D3D83 #83301D #70831D

monochromatic

#070E1F #122651 #1D3D83 #2854B5 #4572D6

Accessibility & contrast

On white

10.26

#1D3D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1D3D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D83

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D83	#FFFFFF	#000000	##FFFFFF
##1D3D83	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4686

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1d3d83;
/* rgb */ color: rgb(29, 61, 131);
/* oklch */ color: oklch(37.9% 0.124 263.2);

Tailwind

colors: {
  custom: {
    50: '#6972a8',
    500: '#1d3d83',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d83;
$custom-light: #6972a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d83",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 131
  },
  "hsl": {
    "h": 221.176,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.37933,
    "c": 0.12404,
    "h": 263.2
  },
  "luminance": 0.05237
}

Semantic roles & 50–950 ramp

primary

#1D3D83

secondary

#B69346

accent

#B341E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D3D83

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →