#1D3183#1D3183

#1D3183 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.4% C 0.140 H 267.9°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#1D3183
RGB	rgb(29, 49, 131)
HSL	hsl(228, 64%, 31%)
HSV	hsv(228, 78%, 51%)
CMYK	cmyk(77.9%, 62.6%, 0%, 48.6%)
CIE-LAB	lab(23.99, 23.36, -48.34)
CIE-LCH	lch(23.99, 53.69, 295.79°)
OKLab	oklab(35.37% -0.0052 -0.1397)
OKLCH	oklch(35.37% 0.14 267.9)
XYZ	xyz(5.7003, 4.0959, 21.9585)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3183 #836F1D

analogous

#1D6483 #1D3183 #3C1D83

triadic

#1D3183 #831D31 #31831D

tetradic

#1D3183 #831D64 #836F1D #1D833C

square

#1D3183 #831D64 #836F1D #1D833C

split-complementary

#1D3183 #833C1D #64831D

monochromatic

#070C1F #121E51 #1D3183 #2844B5 #4561D6

Accessibility & contrast

On white

11.54

#1D3183 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1D3183 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3183

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3183	#FFFFFF	#000000	##FFFFFF
##1D3183	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E86

Deuteranopia (green-blind)

#003481

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1d3183;
/* rgb */ color: rgb(29, 49, 131);
/* oklch */ color: oklch(35.4% 0.140 267.9);

Tailwind

colors: {
  custom: {
    50: '#6a68a8',
    500: '#1d3183',
    950: '#000000',
  },
}

SCSS

$custom: #1d3183;
$custom-light: #6a68a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3183",
  "rgb": {
    "r": 29,
    "g": 49,
    "b": 131
  },
  "hsl": {
    "h": 228.235,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.35366,
    "c": 0.13978,
    "h": 267.9
  },
  "luminance": 0.04097
}

Semantic roles & 50–950 ramp

primary

#1D3183

secondary

#B6A046

accent

#C641E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1D3183

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

Preview Lab → · Contrast checker → · Palette generator →