#1D3E8B#1D3E8B

#1D3E8B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.134 H 263.8°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#1D3E8B
RGB	rgb(29, 62, 139)
HSL	hsl(222, 65%, 33%)
HSV	hsv(222, 79%, 55%)
CMYK	cmyk(79.1%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(28.30, 17.51, -46.31)
CIE-LCH	lch(28.30, 49.51, 290.71°)
OKLab	oklab(38.81% -0.0146 -0.1335)
OKLCH	oklch(38.81% 0.134 263.8)
XYZ	xyz(6.8879, 5.5698, 25.1331)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3E8B #8B6A1D

analogous

#1D758B #1D3E8B #331D8B

triadic

#1D3E8B #8B1D3E #3E8B1D

tetradic

#1D3E8B #8B1D75 #8B6A1D #1D8B33

square

#1D3E8B #8B1D75 #8B6A1D #1D8B33

split-complementary

#1D3E8B #8B331D #758B1D

monochromatic

#081126 #122758 #1D3E8B #2855BE #4974D9

Accessibility & contrast

On white

9.93

#1D3E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1D3E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3E8B

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3E8B	#FFFFFF	#000000	##FFFFFF
##1D3E8B	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3e8b;
/* rgb */ color: rgb(29, 62, 139);
/* oklch */ color: oklch(38.8% 0.134 263.8);

Tailwind

colors: {
  custom: {
    50: '#6b72ad',
    500: '#1d3e8b',
    950: '#000000',
  },
}

SCSS

$custom: #1d3e8b;
$custom-light: #6b72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3e8b",
  "rgb": {
    "r": 29,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 222,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.3881,
    "c": 0.13427,
    "h": 263.8
  },
  "luminance": 0.05571
}

Semantic roles & 50–950 ramp

primary

#1D3E8B

secondary

#BB9949

accent

#B63FE8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1D3E8B

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

Preview Lab → · Contrast checker → · Palette generator →