#1D3E8A#1D3E8A

#1D3E8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.133 H 263.7°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#1D3E8A
RGB	rgb(29, 62, 138)
HSL	hsl(222, 65%, 33%)
HSV	hsv(222, 79%, 54%)
CMYK	cmyk(79%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(28.22, 17.11, -45.81)
CIE-LCH	lch(28.22, 48.90, 290.48°)
OKLab	oklab(38.73% -0.0147 -0.132)
OKLCH	oklch(38.73% 0.133 263.7)
XYZ	xyz(6.8151, 5.5407, 24.7501)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3E8A #8A691D

analogous

#1D748A #1D3E8A #331D8A

triadic

#1D3E8A #8A1D3E #3E8A1D

tetradic

#1D3E8A #8A1D74 #8A691D #1D8A33

square

#1D3E8A #8A1D74 #8A691D #1D8A33

split-complementary

#1D3E8A #8A331D #748A1D

monochromatic

#081125 #122757 #1D3E8A #2855BD #4974D9

Accessibility & contrast

On white

9.96

#1D3E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1D3E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3E8A

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3E8A	#FFFFFF	#000000	##FFFFFF
##1D3E8A	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02488D

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3e8a;
/* rgb */ color: rgb(29, 62, 138);
/* oklch */ color: oklch(38.7% 0.133 263.7);

Tailwind

colors: {
  custom: {
    50: '#6b72ad',
    500: '#1d3e8a',
    950: '#000000',
  },
}

SCSS

$custom: #1d3e8a;
$custom-light: #6b72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3e8a",
  "rgb": {
    "r": 29,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 221.835,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38727,
    "c": 0.13284,
    "h": 263.7
  },
  "luminance": 0.05541
}

Semantic roles & 50–950 ramp

primary

#1D3E8A

secondary

#BB9848

accent

#B540E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1D3E8A

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

Preview Lab → · Contrast checker → · Palette generator →