#1D3683#1D3683

#1D3683 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.133 H 266.2°. Best body text is #FFFFFF at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#1D3683
RGB	rgb(29, 54, 131)
HSL	hsl(225, 64%, 31%)
HSV	hsv(225, 78%, 51%)
CMYK	cmyk(77.9%, 58.8%, 0%, 48.6%)
CIE-LAB	lab(25.37, 19.87, -46.08)
CIE-LCH	lch(25.37, 50.18, 293.33°)
OKLab	oklab(36.4% -0.0089 -0.133)
OKLCH	oklch(36.4% 0.133 266.2)
XYZ	xyz(5.9212, 4.5376, 22.0321)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3683 #836A1D

analogous

#1D6983 #1D3683 #371D83

triadic

#1D3683 #831D36 #36831D

tetradic

#1D3683 #831D69 #836A1D #1D8337

square

#1D3683 #831D69 #836A1D #1D8337

split-complementary

#1D3683 #83371D #69831D

monochromatic

#070D1F #122151 #1D3683 #284BB5 #4568D6

Accessibility & contrast

On white

11.01

#1D3683 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1D3683 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3683

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3683	#FFFFFF	#000000	##FFFFFF
##1D3683	1.00	11.01	1.91	11.01
#FFFFFF	11.01	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003881

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d3683;
/* rgb */ color: rgb(29, 54, 131);
/* oklch */ color: oklch(36.4% 0.133 266.2);

Tailwind

colors: {
  custom: {
    50: '#6a6ca8',
    500: '#1d3683',
    950: '#000000',
  },
}

SCSS

$custom: #1d3683;
$custom-light: #6a6ca8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3683",
  "rgb": {
    "r": 29,
    "g": 54,
    "b": 131
  },
  "hsl": {
    "h": 225.294,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36403,
    "c": 0.13326,
    "h": 266.2
  },
  "luminance": 0.04538
}

Semantic roles & 50–950 ramp

primary

#1D3683

secondary

#B69B46

accent

#BE41E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1D3683

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

Preview Lab → · Contrast checker → · Palette generator →