#1D3C8B#1D3C8B

#1D3C8B is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.137 H 264.5°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#1D3C8B
RGB	rgb(29, 60, 139)
HSL	hsl(223, 65%, 33%)
HSV	hsv(223, 79%, 55%)
CMYK	cmyk(79.1%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(27.73, 18.90, -47.24)
CIE-LCH	lch(27.73, 50.88, 291.81°)
OKLab	oklab(38.38% -0.013 -0.1362)
OKLCH	oklch(38.38% 0.137 264.5)
XYZ	xyz(6.7811, 5.3562, 25.0976)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3C8B #8B6C1D

analogous

#1D738B #1D3C8B #351D8B

triadic

#1D3C8B #8B1D3C #3C8B1D

tetradic

#1D3C8B #8B1D73 #8B6C1D #1D8B35

square

#1D3C8B #8B1D73 #8B6C1D #1D8B35

split-complementary

#1D3C8B #8B351D #738B1D

monochromatic

#081026 #122658 #1D3C8B #2852BE #4972D9

Accessibility & contrast

On white

10.14

#1D3C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1D3C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3C8B

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3C8B	#FFFFFF	#000000	##FFFFFF
##1D3C8B	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1d3c8b;
/* rgb */ color: rgb(29, 60, 139);
/* oklch */ color: oklch(38.4% 0.137 264.5);

Tailwind

colors: {
  custom: {
    50: '#6b71ae',
    500: '#1d3c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1d3c8b;
$custom-light: #6b71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3c8b",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 223.091,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38377,
    "c": 0.13687,
    "h": 264.5
  },
  "luminance": 0.05357
}

Semantic roles & 50–950 ramp

primary

#1D3C8B

secondary

#BB9B49

accent

#B93FE8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3C8B

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

Preview Lab → · Contrast checker → · Palette generator →