#1D3181#1D3181

#1D3181 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.2% C 0.137 H 267.8°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#1D3181
RGB	rgb(29, 49, 129)
HSL	hsl(228, 63%, 31%)
HSV	hsv(228, 78%, 51%)
CMYK	cmyk(77.5%, 62%, 0%, 49.4%)
CIE-LAB	lab(23.81, 22.57, -47.37)
CIE-LCH	lch(23.81, 52.48, 295.47°)
OKLab	oklab(35.18% -0.0052 -0.1368)
OKLCH	oklch(35.18% 0.137 267.8)
XYZ	xyz(5.5661, 4.0422, 21.2515)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3181 #816D1D

analogous

#1D6381 #1D3181 #3B1D81

triadic

#1D3181 #811D31 #31811D

tetradic

#1D3181 #811D63 #816D1D #1D813B

square

#1D3181 #811D63 #816D1D #1D813B

split-complementary

#1D3181 #813B1D #63811D

monochromatic

#070B1D #121E4F #1D3181 #2844B3 #4461D5

Accessibility & contrast

On white

11.61

#1D3181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1D3181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3181

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3181	#FFFFFF	#000000	##FFFFFF
##1D3181	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D84

Deuteranopia (green-blind)

#00347F

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1d3181;
/* rgb */ color: rgb(29, 49, 129);
/* oklch */ color: oklch(35.2% 0.137 267.8);

Tailwind

colors: {
  custom: {
    50: '#6968a6',
    500: '#1d3181',
    950: '#000000',
  },
}

SCSS

$custom: #1d3181;
$custom-light: #6968a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3181",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 129
  },
  "hsl": {
    "h": 228,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.35181,
    "c": 0.13693,
    "h": 267.8
  },
  "luminance": 0.04043
}

Semantic roles & 50–950 ramp

primary

#1D3181

secondary

#B49E46

accent

#C541E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D3181

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

Preview Lab → · Contrast checker → · Palette generator →