#1D3F88#1D3F88

#1D3F88 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.129 H 263.0°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F88
RGB	rgb(29, 63, 136)
HSL	hsl(221, 65%, 32%)
HSV	hsv(221, 79%, 53%)
CMYK	cmyk(78.7%, 53.7%, 0%, 46.7%)
CIE-LAB	lab(28.36, 15.60, -44.35)
CIE-LCH	lch(28.36, 47.01, 289.38°)
OKLab	oklab(38.78% -0.0157 -0.1277)
OKLCH	oklch(38.78% 0.129 263)
XYZ	xyz(6.7265, 5.5930, 24.0128)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F88 #88661D

analogous

#1D7488 #1D3F88 #311D88

triadic

#1D3F88 #881D3F #3F881D

tetradic

#1D3F88 #881D74 #88661D #1D8831

square

#1D3F88 #881D74 #88661D #1D8831

split-complementary

#1D3F88 #88311D #74881D

monochromatic

#071023 #122856 #1D3F88 #2856BA #4875D8

Accessibility & contrast

On white

9.91

#1D3F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1D3F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F88

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F88	#FFFFFF	#000000	##FFFFFF
##1D3F88	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C488B

Deuteranopia (green-blind)

#003E87

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3f88;
/* rgb */ color: rgb(29, 63, 136);
/* oklch */ color: oklch(38.8% 0.129 263.0);

Tailwind

colors: {
  custom: {
    50: '#6a73ab',
    500: '#1d3f88',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f88;
$custom-light: #6a73ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f88",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 136
  },
  "hsl": {
    "h": 220.935,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38784,
    "c": 0.12866,
    "h": 263
  },
  "luminance": 0.05594
}

Semantic roles & 50–950 ramp

primary

#1D3F88

secondary

#BA9547

accent

#B240E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1D3F88

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

Preview Lab → · Contrast checker → · Palette generator →