#1C288D#1C288D

#1C288D is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.6% C 0.165 H 269.5°. Best body text is #FFFFFF at 12.09:1 contrast (WCAG AA passes).

Color values

HEX	#1C288D
RGB	rgb(28, 40, 141)
HSL	hsl(234, 67%, 33%)
HSV	hsv(234, 80%, 55%)
CMYK	cmyk(80.1%, 71.6%, 0%, 44.7%)
CIE-LAB	lab(22.61, 33.15, -56.85)
CIE-LCH	lch(22.61, 65.81, 300.25°)
OKLab	oklab(34.64% -0.0014 -0.1646)
OKLCH	oklch(34.64% 0.165 269.5)
XYZ	xyz(6.0437, 3.6869, 25.5872)
Luminance	0.0369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C288D #8D811C

analogous

#1C608D #1C288D #481C8D

triadic

#1C288D #8D1C28 #288D1C

tetradic

#1C288D #8D1C60 #8D811C #1C8D48

square

#1C288D #8D1C60 #8D811C #1C8D48

split-complementary

#1C288D #8D481C #608D1C

monochromatic

#080B27 #121A5A #1C288D #2636C0 #4958DB

Accessibility & contrast

On white

12.09

#1C288D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1C288D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C288D

12.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C288D	#FFFFFF	#000000	##FFFFFF
##1C288D	1.00	12.09	1.74	12.09
#FFFFFF	12.09	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B90

Deuteranopia (green-blind)

#00318B

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1c288d;
/* rgb */ color: rgb(28, 40, 141);
/* oklch */ color: oklch(34.6% 0.165 269.5);

Tailwind

colors: {
  custom: {
    50: '#6d62af',
    500: '#1c288d',
    950: '#000000',
  },
}

SCSS

$custom: #1c288d;
$custom-light: #6d62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1c288d",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 141
  },
  "hsl": {
    "h": 233.628,
    "s": 66.864,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34637,
    "c": 0.16466,
    "h": 269.5
  },
  "luminance": 0.03688
}

Semantic roles & 50–950 ramp

primary

#1C288D

secondary

#BDB048

accent

#D83EEA

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #1C288D

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

Preview Lab → · Contrast checker → · Palette generator →