#1D3C8A#1D3C8A

#1D3C8A is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.135 H 264.4°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#1D3C8A
RGB	rgb(29, 60, 138)
HSL	hsl(223, 65%, 33%)
HSV	hsv(223, 79%, 54%)
CMYK	cmyk(79%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(27.65, 18.50, -46.75)
CIE-LCH	lch(27.65, 50.27, 291.59°)
OKLab	oklab(38.29% -0.0131 -0.1348)
OKLCH	oklch(38.29% 0.135 264.4)
XYZ	xyz(6.7084, 5.3271, 24.7145)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3C8A #8A6B1D

analogous

#1D728A #1D3C8A #351D8A

triadic

#1D3C8A #8A1D3C #3C8A1D

tetradic

#1D3C8A #8A1D72 #8A6B1D #1D8A35

square

#1D3C8A #8A1D72 #8A6B1D #1D8A35

split-complementary

#1D3C8A #8A351D #728A1D

monochromatic

#081025 #122657 #1D3C8A #2852BD #4972D9

Accessibility & contrast

On white

10.17

#1D3C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1D3C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3C8A

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3C8A	#FFFFFF	#000000	##FFFFFF
##1D3C8A	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1d3c8a;
/* rgb */ color: rgb(29, 60, 138);
/* oklch */ color: oklch(38.3% 0.135 264.4);

Tailwind

colors: {
  custom: {
    50: '#6b71ad',
    500: '#1d3c8a',
    950: '#000000',
  },
}

SCSS

$custom: #1d3c8a;
$custom-light: #6b71ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3c8a",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 222.936,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38292,
    "c": 0.13544,
    "h": 264.4
  },
  "luminance": 0.05328
}

Semantic roles & 50–950 ramp

primary

#1D3C8A

secondary

#BB9A48

accent

#B840E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3C8A

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

Preview Lab → · Contrast checker → · Palette generator →