#1C288C#1C288C

#1C288C is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.5% C 0.163 H 269.5°. Best body text is #FFFFFF at 12.13:1 contrast (WCAG AA passes).

Color values

HEX	#1C288C
RGB	rgb(28, 40, 140)
HSL	hsl(234, 67%, 33%)
HSV	hsv(234, 80%, 55%)
CMYK	cmyk(80%, 71.4%, 0%, 45.1%)
CIE-LAB	lab(22.50, 32.78, -56.40)
CIE-LCH	lch(22.50, 65.24, 300.17°)
OKLab	oklab(34.53% -0.0013 -0.1633)
OKLCH	oklch(34.53% 0.163 269.5)
XYZ	xyz(5.9697, 3.6572, 25.1972)
Luminance	0.0366 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C288C #8C801C

analogous

#1C608C #1C288C #481C8C

triadic

#1C288C #8C1C28 #288C1C

tetradic

#1C288C #8C1C60 #8C801C #1C8C48

square

#1C288C #8C1C60 #8C801C #1C8C48

split-complementary

#1C288C #8C481C #608C1C

monochromatic

#080B26 #121959 #1C288C #2637BF #4858DA

Accessibility & contrast

On white

12.13

#1C288C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1C288C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C288C

12.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C288C	#FFFFFF	#000000	##FFFFFF
##1C288C	1.00	12.13	1.73	12.13
#FFFFFF	12.13	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8F

Deuteranopia (green-blind)

#00308A

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1c288c;
/* rgb */ color: rgb(28, 40, 140);
/* oklch */ color: oklch(34.5% 0.163 269.5);

Tailwind

colors: {
  custom: {
    50: '#6d62af',
    500: '#1c288c',
    950: '#000000',
  },
}

SCSS

$custom: #1c288c;
$custom-light: #6d62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1c288c",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 140
  },
  "hsl": {
    "h": 233.571,
    "s": 66.667,
    "l": 32.941
  },
  "oklch": {
    "l": 0.34531,
    "c": 0.16334,
    "h": 269.5
  },
  "luminance": 0.03658
}

Semantic roles & 50–950 ramp

primary

#1C288C

secondary

#BCB048

accent

#D73EEA

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080510

muted

#7B797F

Preview Lab

Preview with #1C288C

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

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