#1D3F84#1D3F84

#1D3F84 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.123 H 262.4°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F84
RGB	rgb(29, 63, 132)
HSL	hsl(220, 64%, 32%)
HSV	hsv(220, 78%, 52%)
CMYK	cmyk(78%, 52.3%, 0%, 48.2%)
CIE-LAB	lab(28.06, 13.99, -42.34)
CIE-LCH	lch(28.06, 44.59, 288.28°)
OKLab	oklab(38.46% -0.0162 -0.1218)
OKLCH	oklch(38.46% 0.123 262.4)
XYZ	xyz(6.4476, 5.4814, 22.5435)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F84 #84621D

analogous

#1D7384 #1D3F84 #2F1D84

triadic

#1D3F84 #841D3F #3F841D

tetradic

#1D3F84 #841D73 #84621D #1D842F

square

#1D3F84 #841D73 #84621D #1D842F

split-complementary

#1D3F84 #842F1D #73841D

monochromatic

#070F20 #122752 #1D3F84 #2857B6 #4575D6

Accessibility & contrast

On white

10.02

#1D3F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1D3F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F84

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F84	#FFFFFF	#000000	##FFFFFF
##1D3F84	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144786

Deuteranopia (green-blind)

#003E83

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3f84;
/* rgb */ color: rgb(29, 63, 132);
/* oklch */ color: oklch(38.5% 0.123 262.4);

Tailwind

colors: {
  custom: {
    50: '#6973a8',
    500: '#1d3f84',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f84;
$custom-light: #6973a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f84",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 132
  },
  "hsl": {
    "h": 220.194,
    "s": 63.975,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38464,
    "c": 0.12287,
    "h": 262.4
  },
  "luminance": 0.05482
}

Semantic roles & 50–950 ramp

primary

#1D3F84

secondary

#B79246

accent

#B041E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1D3F84

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

Preview Lab → · Contrast checker → · Palette generator →