#1D3F83#1D3F83

#1D3F83 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.4% C 0.121 H 262.3°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F83
RGB	rgb(29, 63, 131)
HSL	hsl(220, 64%, 31%)
HSV	hsv(220, 78%, 51%)
CMYK	cmyk(77.9%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(27.99, 13.58, -41.84)
CIE-LCH	lch(27.99, 43.99, 287.98°)
OKLab	oklab(38.39% -0.0163 -0.1203)
OKLCH	oklch(38.39% 0.121 262.3)
XYZ	xyz(6.3795, 5.4542, 22.1849)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F83 #83611D

analogous

#1D7283 #1D3F83 #2E1D83

triadic

#1D3F83 #831D3F #3F831D

tetradic

#1D3F83 #831D72 #83611D #1D832E

square

#1D3F83 #831D72 #83611D #1D832E

split-complementary

#1D3F83 #832E1D #72831D

monochromatic

#070F1F #122751 #1D3F83 #2857B5 #4575D6

Accessibility & contrast

On white

10.04

#1D3F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1D3F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F83

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F83	#FFFFFF	#000000	##FFFFFF
##1D3F83	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154785

Deuteranopia (green-blind)

#003E82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3f83;
/* rgb */ color: rgb(29, 63, 131);
/* oklch */ color: oklch(38.4% 0.121 262.3);

Tailwind

colors: {
  custom: {
    50: '#6973a8',
    500: '#1d3f83',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f83;
$custom-light: #6973a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f83",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 220,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38385,
    "c": 0.12142,
    "h": 262.3
  },
  "luminance": 0.05455
}

Semantic roles & 50–950 ramp

primary

#1D3F83

secondary

#B69146

accent

#B041E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D3F83

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

Preview Lab → · Contrast checker → · Palette generator →