#1D3C8C#1D3C8C

#1D3C8C is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.138 H 264.6°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#1D3C8C
RGB	rgb(29, 60, 140)
HSL	hsl(223, 66%, 33%)
HSV	hsv(223, 79%, 55%)
CMYK	cmyk(79.3%, 57.1%, 0%, 45.1%)
CIE-LAB	lab(27.81, 19.30, -47.73)
CIE-LCH	lch(27.81, 51.48, 292.02°)
OKLab	oklab(38.46% -0.0129 -0.1377)
OKLCH	oklch(38.46% 0.138 264.6)
XYZ	xyz(6.8545, 5.3856, 25.4841)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3C8C #8C6D1D

analogous

#1D738C #1D3C8C #351D8C

triadic

#1D3C8C #8C1D3C #3C8C1D

tetradic

#1D3C8C #8C1D73 #8C6D1D #1D8C35

square

#1D3C8C #8C1D73 #8C6D1D #1D8C35

split-complementary

#1D3C8C #8C351D #738C1D

monochromatic

#081127 #122659 #1D3C8C #2852BF #4A72D9

Accessibility & contrast

On white

10.11

#1D3C8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1D3C8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3C8C

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3C8C	#FFFFFF	#000000	##FFFFFF
##1D3C8C	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478F

Deuteranopia (green-blind)

#003D8A

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3c8c;
/* rgb */ color: rgb(29, 60, 140);
/* oklch */ color: oklch(38.5% 0.138 264.6);

Tailwind

colors: {
  custom: {
    50: '#6b71ae',
    500: '#1d3c8c',
    950: '#000000',
  },
}

SCSS

$custom: #1d3c8c;
$custom-light: #6b71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3c8c",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 140
  },
  "hsl": {
    "h": 223.243,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38462,
    "c": 0.1383,
    "h": 264.6
  },
  "luminance": 0.05386
}

Semantic roles & 50–950 ramp

primary

#1D3C8C

secondary

#BC9C49

accent

#B93FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3C8C

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

Preview Lab → · Contrast checker → · Palette generator →