#1D3983#1D3983

#1D3983 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.0% C 0.129 H 265.0°. Best body text is #FFFFFF at 10.69:1 contrast (WCAG AA passes).

Color values

HEX	#1D3983
RGB	rgb(29, 57, 131)
HSL	hsl(224, 64%, 31%)
HSV	hsv(224, 78%, 51%)
CMYK	cmyk(77.9%, 56.5%, 0%, 48.6%)
CIE-LAB	lab(26.23, 17.77, -44.69)
CIE-LCH	lch(26.23, 48.09, 291.69°)
OKLab	oklab(37.05% -0.0113 -0.1288)
OKLCH	oklch(37.05% 0.129 265)
XYZ	xyz(6.0651, 4.8255, 22.0801)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3983 #83671D

analogous

#1D6C83 #1D3983 #341D83

triadic

#1D3983 #831D39 #39831D

tetradic

#1D3983 #831D6C #83671D #1D8334

square

#1D3983 #831D6C #83671D #1D8334

split-complementary

#1D3983 #83341D #6C831D

monochromatic

#070D1F #122351 #1D3983 #284FB5 #456CD6

Accessibility & contrast

On white

10.69

#1D3983 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1D3983 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3983

10.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3983	#FFFFFF	#000000	##FFFFFF
##1D3983	1.00	10.69	1.97	10.69
#FFFFFF	10.69	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004386

Deuteranopia (green-blind)

#003A82

Tritanopia (blue-blind)

#004B58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3983;
/* rgb */ color: rgb(29, 57, 131);
/* oklch */ color: oklch(37.0% 0.129 265.0);

Tailwind

colors: {
  custom: {
    50: '#696ea8',
    500: '#1d3983',
    950: '#000000',
  },
}

SCSS

$custom: #1d3983;
$custom-light: #696ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3983",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 131
  },
  "hsl": {
    "h": 223.529,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.37048,
    "c": 0.1293,
    "h": 265
  },
  "luminance": 0.04826
}

Semantic roles & 50–950 ramp

primary

#1D3983

secondary

#B69746

accent

#B941E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1D3983

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

Preview Lab → · Contrast checker → · Palette generator →