#1D3A8A#1D3A8A

#1D3A8A is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.138 H 265.2°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#1D3A8A
RGB	rgb(29, 58, 138)
HSL	hsl(224, 65%, 33%)
HSV	hsv(224, 79%, 54%)
CMYK	cmyk(79%, 58%, 0%, 45.9%)
CIE-LAB	lab(27.08, 19.89, -47.67)
CIE-LCH	lch(27.08, 51.65, 292.65°)
OKLab	oklab(37.86% -0.0116 -0.1376)
OKLCH	oklch(37.86% 0.138 265.2)
XYZ	xyz(6.6056, 5.1216, 24.6803)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3A8A #8A6D1D

analogous

#1D708A #1D3A8A #371D8A

triadic

#1D3A8A #8A1D3A #3A8A1D

tetradic

#1D3A8A #8A1D70 #8A6D1D #1D8A37

square

#1D3A8A #8A1D70 #8A6D1D #1D8A37

split-complementary

#1D3A8A #8A371D #708A1D

monochromatic

#080F25 #122557 #1D3A8A #284FBD #496FD9

Accessibility & contrast

On white

10.37

#1D3A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1D3A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3A8A

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3A8A	#FFFFFF	#000000	##FFFFFF
##1D3A8A	1.00	10.37	2.02	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458D

Deuteranopia (green-blind)

#003B88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1d3a8a;
/* rgb */ color: rgb(29, 58, 138);
/* oklch */ color: oklch(37.9% 0.138 265.2);

Tailwind

colors: {
  custom: {
    50: '#6b6fad',
    500: '#1d3a8a',
    950: '#000000',
  },
}

SCSS

$custom: #1d3a8a;
$custom-light: #6b6fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3a8a",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 224.037,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37863,
    "c": 0.13805,
    "h": 265.2
  },
  "luminance": 0.05122
}

Semantic roles & 50–950 ramp

primary

#1D3A8A

secondary

#BB9C48

accent

#BB40E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3A8A

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

Preview Lab → · Contrast checker → · Palette generator →