#1D3D8B#1D3D8B

#1D3D8B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.136 H 264.2°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D8B
RGB	rgb(29, 61, 139)
HSL	hsl(223, 65%, 33%)
HSV	hsv(223, 79%, 55%)
CMYK	cmyk(79.1%, 56.1%, 0%, 45.5%)
CIE-LAB	lab(28.01, 18.20, -46.77)
CIE-LCH	lch(28.01, 50.19, 291.27°)
OKLab	oklab(38.59% -0.0138 -0.1349)
OKLCH	oklch(38.59% 0.136 264.2)
XYZ	xyz(6.8340, 5.4620, 25.1152)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D8B #8B6B1D

analogous

#1D748B #1D3D8B #341D8B

triadic

#1D3D8B #8B1D3D #3D8B1D

tetradic

#1D3D8B #8B1D74 #8B6B1D #1D8B34

square

#1D3D8B #8B1D74 #8B6B1D #1D8B34

split-complementary

#1D3D8B #8B341D #748B1D

monochromatic

#081126 #122758 #1D3D8B #2853BE #4973D9

Accessibility & contrast

On white

10.04

#1D3D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1D3D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D8B

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D8B	#FFFFFF	#000000	##FFFFFF
##1D3D8B	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3d8b;
/* rgb */ color: rgb(29, 61, 139);
/* oklch */ color: oklch(38.6% 0.136 264.2);

Tailwind

colors: {
  custom: {
    50: '#6b72ad',
    500: '#1d3d8b',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d8b;
$custom-light: #6b72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d8b",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 139
  },
  "hsl": {
    "h": 222.545,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38593,
    "c": 0.13557,
    "h": 264.2
  },
  "luminance": 0.05463
}

Semantic roles & 50–950 ramp

primary

#1D3D8B

secondary

#BB9A49

accent

#B73FE8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3D8B

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

Preview Lab → · Contrast checker → · Palette generator →