#18377C#18377C

#18377C is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.8% C 0.123 H 263.3°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#18377C
RGB	rgb(24, 55, 124)
HSL	hsl(221, 68%, 29%)
HSV	hsv(221, 81%, 49%)
CMYK	cmyk(80.6%, 55.6%, 0%, 51.4%)
CIE-LAB	lab(24.89, 15.71, -42.47)
CIE-LCH	lch(24.89, 45.28, 290.30°)
OKLab	oklab(35.81% -0.0144 -0.1224)
OKLCH	oklch(35.81% 0.123 263.3)
XYZ	xyz(5.3797, 4.3812, 19.6270)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18377C #7C5D18

analogous

#18697C #18377C #2B187C

triadic

#18377C #7C1837 #377C18

tetradic

#18377C #7C1869 #7C5D18 #187C2B

square

#18377C #7C1869 #7C5D18 #187C2B

split-complementary

#18377C #7C2B18 #697C18

monochromatic

#050B1A #0E2049 #18377C #224EAF #3668D8

Accessibility & contrast

On white

11.19

#18377C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#18377C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18377C

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18377C	#FFFFFF	#000000	##FFFFFF
##18377C	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01407E

Deuteranopia (green-blind)

#00377B

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #18377c;
/* rgb */ color: rgb(24, 55, 124);
/* oklch */ color: oklch(35.8% 0.123 263.3);

Tailwind

colors: {
  custom: {
    50: '#666da2',
    500: '#18377c',
    950: '#000000',
  },
}

SCSS

$custom: #18377c;
$custom-light: #666da2;
$custom-dark: #000000;

JSON

{
  "hex": "#18377c",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 124
  },
  "hsl": {
    "h": 221.4,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.35805,
    "c": 0.12326,
    "h": 263.3
  },
  "luminance": 0.04382
}

Semantic roles & 50–950 ramp

primary

#18377C

secondary

#B18D3F

accent

#B53DEA

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #18377C

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

Preview Lab → · Contrast checker → · Palette generator →