#1D3188#1D3188

#1D3188 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.8% C 0.147 H 267.9°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1D3188
RGB	rgb(29, 49, 136)
HSL	hsl(229, 65%, 32%)
HSV	hsv(229, 79%, 53%)
CMYK	cmyk(78.7%, 64%, 0%, 46.7%)
CIE-LAB	lab(24.43, 25.33, -50.74)
CIE-LCH	lch(24.43, 56.71, 296.53°)
OKLab	oklab(35.84% -0.0053 -0.1467)
OKLCH	oklch(35.84% 0.147 267.9)
XYZ	xyz(6.0474, 4.2347, 23.7864)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3188 #88741D

analogous

#1D6788 #1D3188 #3F1D88

triadic

#1D3188 #881D31 #31881D

tetradic

#1D3188 #881D67 #88741D #1D883F

square

#1D3188 #881D67 #88741D #1D883F

split-complementary

#1D3188 #883F1D #67881D

monochromatic

#070D23 #121F56 #1D3188 #2843BA #4863D8

Accessibility & contrast

On white

11.37

#1D3188 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1D3188 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3188

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3188	#FFFFFF	#000000	##FFFFFF
##1D3188	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8B

Deuteranopia (green-blind)

#003586

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d3188;
/* rgb */ color: rgb(29, 49, 136);
/* oklch */ color: oklch(35.8% 0.147 267.9);

Tailwind

colors: {
  custom: {
    50: '#6b68ac',
    500: '#1d3188',
    950: '#000000',
  },
}

SCSS

$custom: #1d3188;
$custom-light: #6b68ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3188",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 136
  },
  "hsl": {
    "h": 228.785,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.35836,
    "c": 0.1468,
    "h": 267.9
  },
  "luminance": 0.04235
}

Semantic roles & 50–950 ramp

primary

#1D3188

secondary

#BAA447

accent

#C840E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3188

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

Preview Lab → · Contrast checker → · Palette generator →