#1D3787#1D3787

#1D3787 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.0% C 0.138 H 266.0°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#1D3787
RGB	rgb(29, 55, 135)
HSL	hsl(225, 65%, 32%)
HSV	hsv(225, 79%, 53%)
CMYK	cmyk(78.5%, 59.3%, 0%, 47.1%)
CIE-LAB	lab(25.99, 20.77, -47.58)
CIE-LCH	lch(25.99, 51.92, 293.59°)
OKLab	oklab(36.97% -0.0095 -0.1373)
OKLCH	oklch(36.97% 0.138 266)
XYZ	xyz(6.2445, 4.7422, 23.5032)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3787 #876D1D

analogous

#1D6C87 #1D3787 #381D87

triadic

#1D3787 #871D37 #37871D

tetradic

#1D3787 #871D6C #876D1D #1D8738

square

#1D3787 #871D6C #876D1D #1D8738

split-complementary

#1D3787 #87381D #6C871D

monochromatic

#070E22 #122255 #1D3787 #284CB9 #476AD7

Accessibility & contrast

On white

10.78

#1D3787 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1D3787 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3787

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3787	#FFFFFF	#000000	##FFFFFF
##1D3787	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438A

Deuteranopia (green-blind)

#003985

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3787;
/* rgb */ color: rgb(29, 55, 135);
/* oklch */ color: oklch(37.0% 0.138 266.0);

Tailwind

colors: {
  custom: {
    50: '#6b6dab',
    500: '#1d3787',
    950: '#000000',
  },
}

SCSS

$custom: #1d3787;
$custom-light: #6b6dab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3787",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 135
  },
  "hsl": {
    "h": 225.283,
    "s": 64.634,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36967,
    "c": 0.13768,
    "h": 266
  },
  "luminance": 0.04743
}

Semantic roles & 50–950 ramp

primary

#1D3787

secondary

#B99D46

accent

#BF40E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3787

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

Preview Lab → · Contrast checker → · Palette generator →