#1D33A8#1D33A8

#1D33A8 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.4% C 0.187 H 267.5°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1D33A8
RGB	rgb(29, 51, 168)
HSL	hsl(231, 71%, 39%)
HSV	hsv(231, 83%, 66%)
CMYK	cmyk(82.7%, 69.6%, 0%, 34.1%)
CIE-LAB	lab(27.99, 36.19, -64.50)
CIE-LCH	lch(27.99, 73.96, 299.30°)
OKLab	oklab(39.38% -0.008 -0.1869)
OKLCH	oklch(39.38% 0.187 267.5)
XYZ	xyz(8.7559, 5.4550, 37.6296)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D33A8 #A8921D

analogous

#1D78A8 #1D33A8 #4D1DA8

triadic

#1D33A8 #A81D33 #33A81D

tetradic

#1D33A8 #A81D78 #A8921D #1DA84D

square

#1D33A8 #A81D78 #A8921D #1DA84D

split-complementary

#1D33A8 #A84D1D #78A81D

monochromatic

#0B1340 #142374 #1D33A8 #2844DA #5C72E3

Accessibility & contrast

On white

10.04

#1D33A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1D33A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D33A8

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D33A8	#FFFFFF	#000000	##FFFFFF
##1D33A8	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)

#0049AC

Deuteranopia (green-blind)

#003BA6

Tritanopia (blue-blind)

#005469

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d33a8;
/* rgb */ color: rgb(29, 51, 168);
/* oklch */ color: oklch(39.4% 0.187 267.5);

Tailwind

colors: {
  custom: {
    50: '#746bc3',
    500: '#1d33a8',
    950: '#000000',
  },
}

SCSS

$custom: #1d33a8;
$custom-light: #746bc3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d33a8",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 168
  },
  "hsl": {
    "h": 230.504,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39376,
    "c": 0.18708,
    "h": 267.5
  },
  "luminance": 0.05456
}

Semantic roles & 50–950 ramp

primary

#1D33A8

secondary

#C7B65A

accent

#D13AED

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #1D33A8

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

Preview Lab → · Contrast checker → · Palette generator →