#1D31A8#1D31A8

#1D31A8 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.0% C 0.189 H 267.8°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#1D31A8
RGB	rgb(29, 49, 168)
HSL	hsl(231, 71%, 39%)
HSV	hsv(231, 83%, 66%)
CMYK	cmyk(82.7%, 70.8%, 0%, 34.1%)
CIE-LAB	lab(27.53, 37.45, -65.27)
CIE-LCH	lch(27.53, 75.25, 299.85°)
OKLab	oklab(39.04% -0.0072 -0.1891)
OKLCH	oklch(39.04% 0.189 267.8)
XYZ	xyz(8.6704, 5.2840, 37.6011)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D31A8 #A8941D

analogous

#1D76A8 #1D31A8 #4E1DA8

triadic

#1D31A8 #A81D31 #31A81D

tetradic

#1D31A8 #A81D76 #A8941D #1DA84E

square

#1D31A8 #A81D76 #A8941D #1DA84E

split-complementary

#1D31A8 #A84E1D #76A81D

monochromatic

#0B1340 #142274 #1D31A8 #2842DA #5C70E3

Accessibility & contrast

On white

10.21

#1D31A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1D31A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D31A8

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D31A8	#FFFFFF	#000000	##FFFFFF
##1D31A8	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048AC

Deuteranopia (green-blind)

#003AA6

Tritanopia (blue-blind)

#005269

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1d31a8;
/* rgb */ color: rgb(29, 49, 168);
/* oklch */ color: oklch(39.0% 0.189 267.8);

Tailwind

colors: {
  custom: {
    50: '#7469c3',
    500: '#1d31a8',
    950: '#000000',
  },
}

SCSS

$custom: #1d31a8;
$custom-light: #7469c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d31a8",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 168
  },
  "hsl": {
    "h": 231.367,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39039,
    "c": 0.18928,
    "h": 267.8
  },
  "luminance": 0.05285
}

Semantic roles & 50–950 ramp

primary

#1D31A8

secondary

#C7B75A

accent

#D43AED

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #1D31A8

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

Preview Lab → · Contrast checker → · Palette generator →