#1D3389#1D3389

#1D3389 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.3% C 0.146 H 267.4°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#1D3389
RGB	rgb(29, 51, 137)
HSL	hsl(228, 65%, 33%)
HSV	hsv(228, 79%, 54%)
CMYK	cmyk(78.8%, 62.8%, 0%, 46.3%)
CIE-LAB	lab(25.06, 24.35, -50.34)
CIE-LCH	lch(25.06, 55.92, 295.81°)
OKLab	oklab(36.33% -0.0066 -0.1455)
OKLCH	oklch(36.33% 0.146 267.4)
XYZ	xyz(6.2043, 4.4343, 24.1910)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3389 #89731D

analogous

#1D6989 #1D3389 #3D1D89

triadic

#1D3389 #891D33 #33891D

tetradic

#1D3389 #891D69 #89731D #1D893D

square

#1D3389 #891D69 #89731D #1D893D

split-complementary

#1D3389 #893D1D #69891D

monochromatic

#080D24 #122056 #1D3389 #2846BC #4865D8

Accessibility & contrast

On white

11.13

#1D3389 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1D3389 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3389

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3389	#FFFFFF	#000000	##FFFFFF
##1D3389	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418C

Deuteranopia (green-blind)

#003787

Tritanopia (blue-blind)

#004959

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3389;
/* rgb */ color: rgb(29, 51, 137);
/* oklch */ color: oklch(36.3% 0.146 267.4);

Tailwind

colors: {
  custom: {
    50: '#6b6aac',
    500: '#1d3389',
    950: '#000000',
  },
}

SCSS

$custom: #1d3389;
$custom-light: #6b6aac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3389",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 137
  },
  "hsl": {
    "h": 227.778,
    "s": 65.06,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36327,
    "c": 0.14566,
    "h": 267.4
  },
  "luminance": 0.04435
}

Semantic roles & 50–950 ramp

primary

#1D3389

secondary

#BAA347

accent

#C640E8

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1D3389

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

Preview Lab → · Contrast checker → · Palette generator →