#1D3388#1D3388

#1D3388 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.144 H 267.4°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1D3388
RGB	rgb(29, 51, 136)
HSL	hsl(228, 65%, 32%)
HSV	hsv(228, 79%, 53%)
CMYK	cmyk(78.7%, 62.5%, 0%, 46.7%)
CIE-LAB	lab(24.97, 23.95, -49.86)
CIE-LCH	lch(24.97, 55.32, 295.66°)
OKLab	oklab(36.23% -0.0066 -0.1441)
OKLCH	oklch(36.23% 0.144 267.4)
XYZ	xyz(6.1329, 4.4058, 23.8149)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3388 #88721D

analogous

#1D6888 #1D3388 #3D1D88

triadic

#1D3388 #881D33 #33881D

tetradic

#1D3388 #881D68 #88721D #1D883D

square

#1D3388 #881D68 #88721D #1D883D

split-complementary

#1D3388 #883D1D #68881D

monochromatic

#070D23 #122056 #1D3388 #2846BA #4865D8

Accessibility & contrast

On white

11.16

#1D3388 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1D3388 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3388

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3388	#FFFFFF	#000000	##FFFFFF
##1D3388	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408B

Deuteranopia (green-blind)

#003686

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3388;
/* rgb */ color: rgb(29, 51, 136);
/* oklch */ color: oklch(36.2% 0.144 267.4);

Tailwind

colors: {
  custom: {
    50: '#6b6aab',
    500: '#1d3388',
    950: '#000000',
  },
}

SCSS

$custom: #1d3388;
$custom-light: #6b6aab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3388",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 136
  },
  "hsl": {
    "h": 227.664,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36234,
    "c": 0.14426,
    "h": 267.4
  },
  "luminance": 0.04406
}

Semantic roles & 50–950 ramp

primary

#1D3388

secondary

#BAA247

accent

#C540E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3388

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

Preview Lab → · Contrast checker → · Palette generator →