#1D3379#1D3379

#1D3379 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.9% C 0.123 H 266.7°. Best body text is #FFFFFF at 11.66:1 contrast (WCAG AA passes).

Color values

HEX	#1D3379
RGB	rgb(29, 51, 121)
HSL	hsl(226, 61%, 29%)
HSV	hsv(226, 76%, 47%)
CMYK	cmyk(76%, 57.9%, 0%, 52.5%)
CIE-LAB	lab(23.70, 17.96, -42.50)
CIE-LCH	lch(23.70, 46.14, 292.91°)
OKLab	oklab(34.89% -0.0071 -0.1225)
OKLCH	oklch(34.89% 0.123 266.7)
XYZ	xyz(5.1405, 4.0088, 18.5883)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3379 #79631D

analogous

#1D6179 #1D3379 #351D79

triadic

#1D3379 #791D33 #33791D

tetradic

#1D3379 #791D61 #79631D #1D7935

square

#1D3379 #791D61 #79631D #1D7935

split-complementary

#1D3379 #79351D #61791D

monochromatic

#060A19 #111E48 #1D3379 #2948AA #3F62D1

Accessibility & contrast

On white

11.66

#1D3379 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1D3379 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3379

11.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3379	#FFFFFF	#000000	##FFFFFF
##1D3379	1.00	11.66	1.80	11.66
#FFFFFF	11.66	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7B

Deuteranopia (green-blind)

#003478

Tritanopia (blue-blind)

#004450

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1d3379;
/* rgb */ color: rgb(29, 51, 121);
/* oklch */ color: oklch(34.9% 0.123 266.7);

Tailwind

colors: {
  custom: {
    50: '#676aa0',
    500: '#1d3379',
    950: '#000000',
  },
}

SCSS

$custom: #1d3379;
$custom-light: #676aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3379",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 121
  },
  "hsl": {
    "h": 225.652,
    "s": 61.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.34888,
    "c": 0.12269,
    "h": 266.7
  },
  "luminance": 0.04009
}

Semantic roles & 50–950 ramp

primary

#1D3379

secondary

#AD9445

accent

#BE43E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060F

muted

#7A7A7E

Preview Lab

Preview with #1D3379

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

Preview Lab → · Contrast checker → · Palette generator →