#1D3988#1D3988

#1D3988 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.137 H 265.4°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#1D3988
RGB	rgb(29, 57, 136)
HSL	hsl(224, 65%, 32%)
HSV	hsv(224, 79%, 53%)
CMYK	cmyk(78.7%, 58.1%, 0%, 46.7%)
CIE-LAB	lab(26.63, 19.78, -47.15)
CIE-LCH	lch(26.63, 51.14, 292.76°)
OKLab	oklab(37.48% -0.011 -0.1361)
OKLCH	oklch(37.48% 0.137 265.4)
XYZ	xyz(6.4122, 4.9643, 23.9080)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3988 #886C1D

analogous

#1D6F88 #1D3988 #371D88

triadic

#1D3988 #881D39 #39881D

tetradic

#1D3988 #881D6F #886C1D #1D8837

square

#1D3988 #881D6F #886C1D #1D8837

split-complementary

#1D3988 #88371D #6F881D

monochromatic

#070F23 #122456 #1D3988 #284EBA #486DD8

Accessibility & contrast

On white

10.54

#1D3988 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1D3988 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3988

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3988	#FFFFFF	#000000	##FFFFFF
##1D3988	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448B

Deuteranopia (green-blind)

#003A86

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d3988;
/* rgb */ color: rgb(29, 57, 136);
/* oklch */ color: oklch(37.5% 0.137 265.4);

Tailwind

colors: {
  custom: {
    50: '#6b6eab',
    500: '#1d3988',
    950: '#000000',
  },
}

SCSS

$custom: #1d3988;
$custom-light: #6b6eab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3988",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 136
  },
  "hsl": {
    "h": 224.299,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37477,
    "c": 0.1365,
    "h": 265.4
  },
  "luminance": 0.04965
}

Semantic roles & 50–950 ramp

primary

#1D3988

secondary

#BA9C47

accent

#BC40E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3988

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

Preview Lab → · Contrast checker → · Palette generator →