#1D3F8D#1D3F8D

#1D3F8D is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.136 H 263.6°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F8D
RGB	rgb(29, 63, 141)
HSL	hsl(222, 66%, 33%)
HSV	hsv(222, 79%, 55%)
CMYK	cmyk(79.4%, 55.3%, 0%, 44.7%)
CIE-LAB	lab(28.74, 17.62, -46.82)
CIE-LCH	lch(28.74, 50.03, 290.62°)
OKLab	oklab(39.2% -0.0151 -0.135)
OKLCH	oklch(39.2% 0.136 263.6)
XYZ	xyz(7.0902, 5.7385, 25.9281)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F8D #8D6B1D

analogous

#1D778D #1D3F8D #331D8D

triadic

#1D3F8D #8D1D3F #3F8D1D

tetradic

#1D3F8D #8D1D77 #8D6B1D #1D8D33

square

#1D3F8D #8D1D77 #8D6B1D #1D8D33

split-complementary

#1D3F8D #8D331D #778D1D

monochromatic

#081227 #13285A #1D3F8D #2756C0 #4B76DA

Accessibility & contrast

On white

9.78

#1D3F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1D3F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F8D

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F8D	#FFFFFF	#000000	##FFFFFF
##1D3F8D	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004990

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d3f8d;
/* rgb */ color: rgb(29, 63, 141);
/* oklch */ color: oklch(39.2% 0.136 263.6);

Tailwind

colors: {
  custom: {
    50: '#6b73af',
    500: '#1d3f8d',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f8d;
$custom-light: #6b73af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f8d",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 141
  },
  "hsl": {
    "h": 221.786,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.39195,
    "c": 0.13583,
    "h": 263.6
  },
  "luminance": 0.05739
}

Semantic roles & 50–950 ramp

primary

#1D3F8D

secondary

#BC994A

accent

#B53FE9

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1D3F8D

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

Preview Lab → · Contrast checker → · Palette generator →