#1D3788#1D3788

#1D3788 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.139 H 266.1°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#1D3788
RGB	rgb(29, 55, 136)
HSL	hsl(225, 65%, 32%)
HSV	hsv(225, 79%, 53%)
CMYK	cmyk(78.7%, 59.6%, 0%, 46.7%)
CIE-LAB	lab(26.07, 21.18, -48.07)
CIE-LCH	lch(26.07, 52.53, 293.77°)
OKLab	oklab(37.06% -0.0095 -0.1388)
OKLCH	oklch(37.06% 0.139 266.1)
XYZ	xyz(6.3153, 4.7705, 23.8757)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3788 #886E1D

analogous

#1D6C88 #1D3788 #391D88

triadic

#1D3788 #881D37 #37881D

tetradic

#1D3788 #881D6C #886E1D #1D8839

square

#1D3788 #881D6C #886E1D #1D8839

split-complementary

#1D3788 #88391D #6C881D

monochromatic

#070E23 #122356 #1D3788 #284BBA #486BD8

Accessibility & contrast

On white

10.75

#1D3788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1D3788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3788

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3788	#FFFFFF	#000000	##FFFFFF
##1D3788	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438B

Deuteranopia (green-blind)

#003986

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3788;
/* rgb */ color: rgb(29, 55, 136);
/* oklch */ color: oklch(37.1% 0.139 266.1);

Tailwind

colors: {
  custom: {
    50: '#6b6dab',
    500: '#1d3788',
    950: '#000000',
  },
}

SCSS

$custom: #1d3788;
$custom-light: #6b6dab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3788",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 136
  },
  "hsl": {
    "h": 225.421,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37055,
    "c": 0.1391,
    "h": 266.1
  },
  "luminance": 0.04771
}

Semantic roles & 50–950 ramp

primary

#1D3788

secondary

#BA9E47

accent

#BF40E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3788

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

Preview Lab → · Contrast checker → · Palette generator →