#1D3A8D#1D3A8D

#1D3A8D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.1% C 0.142 H 265.4°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#1D3A8D
RGB	rgb(29, 58, 141)
HSL	hsl(224, 66%, 33%)
HSV	hsv(224, 79%, 55%)
CMYK	cmyk(79.4%, 58.9%, 0%, 44.7%)
CIE-LAB	lab(27.32, 21.09, -49.13)
CIE-LCH	lch(27.32, 53.46, 293.23°)
OKLab	oklab(38.13% -0.0114 -0.1418)
OKLCH	oklch(38.13% 0.142 265.4)
XYZ	xyz(6.8258, 5.2096, 25.8400)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3A8D #8D701D

analogous

#1D728D #1D3A8D #381D8D

triadic

#1D3A8D #8D1D3A #3A8D1D

tetradic

#1D3A8D #8D1D72 #8D701D #1D8D38

square

#1D3A8D #8D1D72 #8D701D #1D8D38

split-complementary

#1D3A8D #8D381D #728D1D

monochromatic

#081027 #13255A #1D3A8D #274FC0 #4B70DA

Accessibility & contrast

On white

10.28

#1D3A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1D3A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3A8D

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3A8D	#FFFFFF	#000000	##FFFFFF
##1D3A8D	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004690

Deuteranopia (green-blind)

#003C8B

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1d3a8d;
/* rgb */ color: rgb(29, 58, 141);
/* oklch */ color: oklch(38.1% 0.142 265.4);

Tailwind

colors: {
  custom: {
    50: '#6c6faf',
    500: '#1d3a8d',
    950: '#000000',
  },
}

SCSS

$custom: #1d3a8d;
$custom-light: #6c6faf;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3a8d",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 141
  },
  "hsl": {
    "h": 224.464,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.38125,
    "c": 0.14231,
    "h": 265.4
  },
  "luminance": 0.0521
}

Semantic roles & 50–950 ramp

primary

#1D3A8D

secondary

#BC9E4A

accent

#BD3FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1D3A8D

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

Preview Lab → · Contrast checker → · Palette generator →