#1D3783#1D3783

#1D3783 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.6% C 0.132 H 265.8°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#1D3783
RGB	rgb(29, 55, 131)
HSL	hsl(225, 64%, 31%)
HSV	hsv(225, 78%, 51%)
CMYK	cmyk(77.9%, 58%, 0%, 48.6%)
CIE-LAB	lab(25.66, 19.17, -45.62)
CIE-LCH	lch(25.66, 49.48, 292.80°)
OKLab	oklab(36.62% -0.0097 -0.1316)
OKLCH	oklch(36.62% 0.132 265.8)
XYZ	xyz(5.9682, 4.6316, 22.0478)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3783 #83691D

analogous

#1D6A83 #1D3783 #361D83

triadic

#1D3783 #831D37 #37831D

tetradic

#1D3783 #831D6A #83691D #1D8336

square

#1D3783 #831D6A #83691D #1D8336

split-complementary

#1D3783 #83361D #6A831D

monochromatic

#070D1F #122251 #1D3783 #284CB5 #456AD6

Accessibility & contrast

On white

10.90

#1D3783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1D3783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3783

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3783	#FFFFFF	#000000	##FFFFFF
##1D3783	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004286

Deuteranopia (green-blind)

#003882

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3783;
/* rgb */ color: rgb(29, 55, 131);
/* oklch */ color: oklch(36.6% 0.132 265.8);

Tailwind

colors: {
  custom: {
    50: '#696da8',
    500: '#1d3783',
    950: '#000000',
  },
}

SCSS

$custom: #1d3783;
$custom-light: #696da8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3783",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 131
  },
  "hsl": {
    "h": 224.706,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36616,
    "c": 0.13194,
    "h": 265.8
  },
  "luminance": 0.04632
}

Semantic roles & 50–950 ramp

primary

#1D3783

secondary

#B69946

accent

#BD41E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1D3783

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

Preview Lab → · Contrast checker → · Palette generator →