#1D3789#1D3789

#1D3789 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.141 H 266.2°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#1D3789
RGB	rgb(29, 55, 137)
HSL	hsl(226, 65%, 33%)
HSV	hsv(226, 79%, 54%)
CMYK	cmyk(78.8%, 59.9%, 0%, 46.3%)
CIE-LAB	lab(26.15, 21.57, -48.55)
CIE-LCH	lch(26.15, 53.13, 293.96°)
OKLab	oklab(37.14% -0.0094 -0.1402)
OKLCH	oklch(37.14% 0.141 266.2)
XYZ	xyz(6.3867, 4.7990, 24.2518)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3789 #896F1D

analogous

#1D6D89 #1D3789 #391D89

triadic

#1D3789 #891D37 #37891D

tetradic

#1D3789 #891D6D #896F1D #1D8939

square

#1D3789 #891D6D #896F1D #1D8939

split-complementary

#1D3789 #89391D #6D891D

monochromatic

#080E24 #122356 #1D3789 #284BBC #486BD8

Accessibility & contrast

On white

10.71

#1D3789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1D3789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3789

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3789	#FFFFFF	#000000	##FFFFFF
##1D3789	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438C

Deuteranopia (green-blind)

#003987

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3789;
/* rgb */ color: rgb(29, 55, 137);
/* oklch */ color: oklch(37.1% 0.141 266.2);

Tailwind

colors: {
  custom: {
    50: '#6b6dac',
    500: '#1d3789',
    950: '#000000',
  },
}

SCSS

$custom: #1d3789;
$custom-light: #6b6dac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3789",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 137
  },
  "hsl": {
    "h": 225.556,
    "s": 65.06,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37144,
    "c": 0.14053,
    "h": 266.2
  },
  "luminance": 0.048
}

Semantic roles & 50–950 ramp

primary

#1D3789

secondary

#BA9F47

accent

#C040E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3789

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

Preview Lab → · Contrast checker → · Palette generator →