#1C3F88#1C3F88

#1C3F88 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.7% C 0.129 H 262.7°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F88
RGB	rgb(28, 63, 136)
HSL	hsl(221, 66%, 32%)
HSV	hsv(221, 79%, 53%)
CMYK	cmyk(79.4%, 53.7%, 0%, 46.7%)
CIE-LAB	lab(28.32, 15.48, -44.41)
CIE-LCH	lch(28.32, 47.03, 289.22°)
OKLab	oklab(38.75% -0.0164 -0.1279)
OKLCH	oklch(38.75% 0.129 262.7)
XYZ	xyz(6.6987, 5.5787, 24.0115)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F88 #88651C

analogous

#1C7588 #1C3F88 #2F1C88

triadic

#1C3F88 #881C3F #3F881C

tetradic

#1C3F88 #881C75 #88651C #1C882F

square

#1C3F88 #881C75 #88651C #1C882F

split-complementary

#1C3F88 #882F1C #75881C

monochromatic

#071022 #122755 #1C3F88 #2657BB #4675D9

Accessibility & contrast

On white

9.93

#1C3F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1C3F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F88

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F88	#FFFFFF	#000000	##FFFFFF
##1C3F88	1.00	9.93	2.12	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C488B

Deuteranopia (green-blind)

#003E87

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c3f88;
/* rgb */ color: rgb(28, 63, 136);
/* oklch */ color: oklch(38.7% 0.129 262.7);

Tailwind

colors: {
  custom: {
    50: '#6a73ab',
    500: '#1c3f88',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f88;
$custom-light: #6a73ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f88",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 136
  },
  "hsl": {
    "h": 220.556,
    "s": 65.854,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38745,
    "c": 0.12895,
    "h": 262.7
  },
  "luminance": 0.05579
}

Semantic roles & 50–950 ramp

primary

#1C3F88

secondary

#BA9545

accent

#B23FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1C3F88

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

Preview Lab → · Contrast checker → · Palette generator →