#1C3F83#1C3F83

#1C3F83 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.122 H 261.9°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F83
RGB	rgb(28, 63, 131)
HSL	hsl(220, 65%, 31%)
HSV	hsv(220, 79%, 51%)
CMYK	cmyk(78.6%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(27.95, 13.45, -41.90)
CIE-LCH	lch(27.95, 44.01, 287.80°)
OKLab	oklab(38.34% -0.0171 -0.1205)
OKLCH	oklch(38.34% 0.122 261.9)
XYZ	xyz(6.3517, 5.4399, 22.1836)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F83 #83601C

analogous

#1C7283 #1C3F83 #2C1C83

triadic

#1C3F83 #831C3F #3F831C

tetradic

#1C3F83 #831C72 #83601C #1C832C

square

#1C3F83 #831C72 #83601C #1C832C

split-complementary

#1C3F83 #832C1C #72831C

monochromatic

#060F1E #112751 #1C3F83 #2757B5 #4375D7

Accessibility & contrast

On white

10.06

#1C3F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1C3F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F83

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F83	#FFFFFF	#000000	##FFFFFF
##1C3F83	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154785

Deuteranopia (green-blind)

#003E82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1c3f83;
/* rgb */ color: rgb(28, 63, 131);
/* oklch */ color: oklch(38.3% 0.122 261.9);

Tailwind

colors: {
  custom: {
    50: '#6973a8',
    500: '#1c3f83',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f83;
$custom-light: #6973a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f83",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 219.612,
    "s": 64.78,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38344,
    "c": 0.12172,
    "h": 261.9
  },
  "luminance": 0.05441
}

Semantic roles & 50–950 ramp

primary

#1C3F83

secondary

#B69045

accent

#AF40E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1C3F83

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

Preview Lab → · Contrast checker → · Palette generator →