#1D3A88#1D3A88

#1D3A88 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.135 H 265.0°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#1D3A88
RGB	rgb(29, 58, 136)
HSL	hsl(224, 65%, 32%)
HSV	hsv(224, 79%, 53%)
CMYK	cmyk(78.7%, 57.4%, 0%, 46.7%)
CIE-LAB	lab(26.92, 19.08, -46.69)
CIE-LCH	lch(26.92, 50.44, 292.23°)
OKLab	oklab(37.69% -0.0117 -0.1347)
OKLCH	oklch(37.69% 0.135 265)
XYZ	xyz(6.4621, 5.0642, 23.9247)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3A88 #886B1D

analogous

#1D7088 #1D3A88 #351D88

triadic

#1D3A88 #881D3A #3A881D

tetradic

#1D3A88 #881D70 #886B1D #1D8835

square

#1D3A88 #881D70 #886B1D #1D8835

split-complementary

#1D3A88 #88351D #70881D

monochromatic

#070F23 #122456 #1D3A88 #2850BA #486FD8

Accessibility & contrast

On white

10.43

#1D3A88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1D3A88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3A88

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3A88	#FFFFFF	#000000	##FFFFFF
##1D3A88	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458B

Deuteranopia (green-blind)

#003B86

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1d3a88;
/* rgb */ color: rgb(29, 58, 136);
/* oklch */ color: oklch(37.7% 0.135 265.0);

Tailwind

colors: {
  custom: {
    50: '#6b6fab',
    500: '#1d3a88',
    950: '#000000',
  },
}

SCSS

$custom: #1d3a88;
$custom-light: #6b6fab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3a88",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 136
  },
  "hsl": {
    "h": 223.738,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37691,
    "c": 0.1352,
    "h": 265
  },
  "luminance": 0.05065
}

Semantic roles & 50–950 ramp

primary

#1D3A88

secondary

#BA9B47

accent

#BA40E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3A88

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

Preview Lab → · Contrast checker → · Palette generator →