#1D3F85#1D3F85

#1D3F85 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.124 H 262.6°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F85
RGB	rgb(29, 63, 133)
HSL	hsl(220, 64%, 32%)
HSV	hsv(220, 78%, 52%)
CMYK	cmyk(78.2%, 52.6%, 0%, 47.8%)
CIE-LAB	lab(28.14, 14.39, -42.85)
CIE-LCH	lch(28.14, 45.20, 288.56°)
OKLab	oklab(38.54% -0.016 -0.1233)
OKLCH	oklch(38.54% 0.124 262.6)
XYZ	xyz(6.5163, 5.5089, 22.9057)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F85 #85631D

analogous

#1D7385 #1D3F85 #2F1D85

triadic

#1D3F85 #851D3F #3F851D

tetradic

#1D3F85 #851D73 #85631D #1D852F

square

#1D3F85 #851D73 #85631D #1D852F

split-complementary

#1D3F85 #852F1D #73851D

monochromatic

#070F21 #122753 #1D3F85 #2857B7 #4675D7

Accessibility & contrast

On white

9.99

#1D3F85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1D3F85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F85

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F85	#FFFFFF	#000000	##FFFFFF
##1D3F85	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124788

Deuteranopia (green-blind)

#003E84

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3f85;
/* rgb */ color: rgb(29, 63, 133);
/* oklch */ color: oklch(38.5% 0.124 262.6);

Tailwind

colors: {
  custom: {
    50: '#6973a9',
    500: '#1d3f85',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f85;
$custom-light: #6973a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f85",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 133
  },
  "hsl": {
    "h": 220.385,
    "s": 64.198,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38543,
    "c": 0.12432,
    "h": 262.6
  },
  "luminance": 0.0551
}

Semantic roles & 50–950 ramp

primary

#1D3F85

secondary

#B89346

accent

#B141E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1D3F85

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

Preview Lab → · Contrast checker → · Palette generator →