#1D3583#1D3583

#1D3583 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.135 H 266.5°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#1D3583
RGB	rgb(29, 53, 131)
HSL	hsl(226, 64%, 31%)
HSV	hsv(226, 78%, 51%)
CMYK	cmyk(77.9%, 59.5%, 0%, 48.6%)
CIE-LAB	lab(25.09, 20.57, -46.54)
CIE-LCH	lch(25.09, 50.88, 293.85°)
OKLab	oklab(36.19% -0.0082 -0.1343)
OKLCH	oklch(36.19% 0.135 266.5)
XYZ	xyz(5.8751, 4.4455, 22.0168)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3583 #836B1D

analogous

#1D6883 #1D3583 #381D83

triadic

#1D3583 #831D35 #35831D

tetradic

#1D3583 #831D68 #836B1D #1D8338

square

#1D3583 #831D68 #836B1D #1D8338

split-complementary

#1D3583 #83381D #68831D

monochromatic

#070C1F #122151 #1D3583 #2849B5 #4567D6

Accessibility & contrast

On white

11.12

#1D3583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1D3583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3583

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3583	#FFFFFF	#000000	##FFFFFF
##1D3583	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004086

Deuteranopia (green-blind)

#003781

Tritanopia (blue-blind)

#004856

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d3583;
/* rgb */ color: rgb(29, 53, 131);
/* oklch */ color: oklch(36.2% 0.135 266.5);

Tailwind

colors: {
  custom: {
    50: '#6a6ba8',
    500: '#1d3583',
    950: '#000000',
  },
}

SCSS

$custom: #1d3583;
$custom-light: #6a6ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3583",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 131
  },
  "hsl": {
    "h": 225.882,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36192,
    "c": 0.13457,
    "h": 266.5
  },
  "luminance": 0.04446
}

Semantic roles & 50–950 ramp

primary

#1D3583

secondary

#B69C46

accent

#C041E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1D3583

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

Preview Lab → · Contrast checker → · Palette generator →