#1D3689#1D3689

#1D3689 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.142 H 266.5°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#1D3689
RGB	rgb(29, 54, 137)
HSL	hsl(226, 65%, 33%)
HSV	hsv(226, 79%, 54%)
CMYK	cmyk(78.8%, 60.6%, 0%, 46.3%)
CIE-LAB	lab(25.88, 22.27, -49.01)
CIE-LCH	lch(25.88, 53.83, 294.44°)
OKLab	oklab(36.94% -0.0087 -0.1415)
OKLCH	oklch(36.94% 0.142 266.5)
XYZ	xyz(6.3396, 4.7050, 24.2361)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3689 #89701D

analogous

#1D6C89 #1D3689 #3A1D89

triadic

#1D3689 #891D36 #36891D

tetradic

#1D3689 #891D6C #89701D #1D893A

square

#1D3689 #891D6C #89701D #1D893A

split-complementary

#1D3689 #893A1D #6C891D

monochromatic

#080E24 #122256 #1D3689 #284ABC #4869D8

Accessibility & contrast

On white

10.82

#1D3689 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1D3689 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3689

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3689	#FFFFFF	#000000	##FFFFFF
##1D3689	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428C

Deuteranopia (green-blind)

#003887

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3689;
/* rgb */ color: rgb(29, 54, 137);
/* oklch */ color: oklch(36.9% 0.142 266.5);

Tailwind

colors: {
  custom: {
    50: '#6b6cac',
    500: '#1d3689',
    950: '#000000',
  },
}

SCSS

$custom: #1d3689;
$custom-light: #6b6cac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3689",
  "rgb": {
    "r": 29,
    "g": 54,
    "b": 137
  },
  "hsl": {
    "h": 226.111,
    "s": 65.06,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36937,
    "c": 0.14182,
    "h": 266.5
  },
  "luminance": 0.04706
}

Semantic roles & 50–950 ramp

primary

#1D3689

secondary

#BAA047

accent

#C140E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3689

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

Preview Lab → · Contrast checker → · Palette generator →