#1D3688#1D3688

#1D3688 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.140 H 266.4°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1D3688
RGB	rgb(29, 54, 136)
HSL	hsl(226, 65%, 32%)
HSV	hsv(226, 79%, 53%)
CMYK	cmyk(78.7%, 60.3%, 0%, 46.7%)
CIE-LAB	lab(25.79, 21.87, -48.52)
CIE-LCH	lch(25.79, 53.22, 294.26°)
OKLab	oklab(36.85% -0.0087 -0.1401)
OKLCH	oklch(36.85% 0.14 266.4)
XYZ	xyz(6.2682, 4.6764, 23.8601)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3688 #886F1D

analogous

#1D6C88 #1D3688 #391D88

triadic

#1D3688 #881D36 #36881D

tetradic

#1D3688 #881D6C #886F1D #1D8839

square

#1D3688 #881D6C #886F1D #1D8839

split-complementary

#1D3688 #88391D #6C881D

monochromatic

#070E23 #122256 #1D3688 #284ABA #4869D8

Accessibility & contrast

On white

10.85

#1D3688 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1D3688 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3688

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3688	#FFFFFF	#000000	##FFFFFF
##1D3688	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428B

Deuteranopia (green-blind)

#003886

Tritanopia (blue-blind)

#004B59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3688;
/* rgb */ color: rgb(29, 54, 136);
/* oklch */ color: oklch(36.8% 0.140 266.4);

Tailwind

colors: {
  custom: {
    50: '#6b6cab',
    500: '#1d3688',
    950: '#000000',
  },
}

SCSS

$custom: #1d3688;
$custom-light: #6b6cab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3688",
  "rgb": {
    "r": 29,
    "g": 54,
    "b": 136
  },
  "hsl": {
    "h": 225.981,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36847,
    "c": 0.1404,
    "h": 266.4
  },
  "luminance": 0.04677
}

Semantic roles & 50–950 ramp

primary

#1D3688

secondary

#BA9F47

accent

#C140E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3688

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

Preview Lab → · Contrast checker → · Palette generator →