#18377B#18377B

#18377B is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.7% C 0.122 H 263.2°. Best body text is #FFFFFF at 11.22:1 contrast (WCAG AA passes).

Color values

HEX	#18377B
RGB	rgb(24, 55, 123)
HSL	hsl(221, 67%, 29%)
HSV	hsv(221, 80%, 48%)
CMYK	cmyk(80.5%, 55.3%, 0%, 51.8%)
CIE-LAB	lab(24.82, 15.30, -41.97)
CIE-LCH	lch(24.82, 44.67, 290.03°)
OKLab	oklab(35.72% -0.0145 -0.1209)
OKLCH	oklch(35.72% 0.122 263.2)
XYZ	xyz(5.3168, 4.3560, 19.2956)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18377B #7B5C18

analogous

#18697B #18377B #2B187B

triadic

#18377B #7B1837 #377B18

tetradic

#18377B #7B1869 #7B5C18 #187B2B

square

#18377B #7B1869 #7B5C18 #187B2B

split-complementary

#18377B #7B2B18 #697B18

monochromatic

#050B1A #0E2048 #18377B #224EAE #3668D8

Accessibility & contrast

On white

11.22

#18377B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#18377B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18377B

11.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18377B	#FFFFFF	#000000	##FFFFFF
##18377B	1.00	11.22	1.87	11.22
#FFFFFF	11.22	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03407D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004853

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #18377b;
/* rgb */ color: rgb(24, 55, 123);
/* oklch */ color: oklch(35.7% 0.122 263.2);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#18377b",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 123
  },
  "hsl": {
    "h": 221.212,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35721,
    "c": 0.1218,
    "h": 263.2
  },
  "luminance": 0.04357
}

Semantic roles & 50–950 ramp

primary

#18377B

secondary

#B08C3F

accent

#B43EEA

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #18377B

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

Preview Lab → · Contrast checker → · Palette generator →