#1D3F8F#1D3F8F

#1D3F8F is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.139 H 263.8°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F8F
RGB	rgb(29, 63, 143)
HSL	hsl(222, 66%, 34%)
HSV	hsv(222, 80%, 56%)
CMYK	cmyk(79.7%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(28.90, 18.43, -47.80)
CIE-LCH	lch(28.90, 51.23, 291.08°)
OKLab	oklab(39.36% -0.015 -0.1379)
OKLCH	oklch(39.36% 0.139 263.8)
XYZ	xyz(7.2404, 5.7986, 26.7189)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F8F #8F6D1D

analogous

#1D788F #1D3F8F #341D8F

triadic

#1D3F8F #8F1D3F #3F8F1D

tetradic

#1D3F8F #8F1D78 #8F6D1D #1D8F34

square

#1D3F8F #8F1D78 #8F6D1D #1D8F34

split-complementary

#1D3F8F #8F341D #788F1D

monochromatic

#081229 #13295C #1D3F8F #2755C2 #4C76DB

Accessibility & contrast

On white

9.72

#1D3F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1D3F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F8F

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F8F	#FFFFFF	#000000	##FFFFFF
##1D3F8F	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A92

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d3f8f;
/* rgb */ color: rgb(29, 63, 143);
/* oklch */ color: oklch(39.4% 0.139 263.8);

Tailwind

colors: {
  custom: {
    50: '#6c73b0',
    500: '#1d3f8f',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f8f;
$custom-light: #6c73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f8f",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 222.105,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.39361,
    "c": 0.13867,
    "h": 263.8
  },
  "luminance": 0.05799
}

Semantic roles & 50–950 ramp

primary

#1D3F8F

secondary

#BD9B4B

accent

#B63FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1D3F8F

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

Preview Lab → · Contrast checker → · Palette generator →