#1D3D8F#1D3D8F

#1D3D8F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.141 H 264.5°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D8F
RGB	rgb(29, 61, 143)
HSL	hsl(223, 66%, 34%)
HSV	hsv(223, 80%, 56%)
CMYK	cmyk(79.7%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(28.33, 19.81, -48.73)
CIE-LCH	lch(28.33, 52.60, 292.13°)
OKLab	oklab(38.93% -0.0135 -0.1406)
OKLCH	oklch(38.93% 0.141 264.5)
XYZ	xyz(7.1316, 5.5810, 26.6827)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D8F #8F6F1D

analogous

#1D768F #1D3D8F #361D8F

triadic

#1D3D8F #8F1D3D #3D8F1D

tetradic

#1D3D8F #8F1D76 #8F6F1D #1D8F36

square

#1D3D8F #8F1D76 #8F6F1D #1D8F36

split-complementary

#1D3D8F #8F361D #768F1D

monochromatic

#081229 #13275C #1D3D8F #2753C2 #4C74DB

Accessibility & contrast

On white

9.92

#1D3D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1D3D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D8F

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D8F	#FFFFFF	#000000	##FFFFFF
##1D3D8F	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3d8f;
/* rgb */ color: rgb(29, 61, 143);
/* oklch */ color: oklch(38.9% 0.141 264.5);

Tailwind

colors: {
  custom: {
    50: '#6c72b0',
    500: '#1d3d8f',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d8f;
$custom-light: #6c72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d8f",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 223.158,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.38932,
    "c": 0.14126,
    "h": 264.5
  },
  "luminance": 0.05582
}

Semantic roles & 50–950 ramp

primary

#1D3D8F

secondary

#BD9D4B

accent

#B93FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1D3D8F

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

Preview Lab → · Contrast checker → · Palette generator →