#18377D#18377D

#18377D is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.125 H 263.4°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#18377D
RGB	rgb(24, 55, 125)
HSL	hsl(222, 68%, 29%)
HSV	hsv(222, 81%, 49%)
CMYK	cmyk(80.8%, 56%, 0%, 51%)
CIE-LAB	lab(24.97, 16.12, -42.97)
CIE-LCH	lch(24.97, 45.90, 290.56°)
OKLab	oklab(35.89% -0.0143 -0.1239)
OKLCH	oklch(35.89% 0.125 263.4)
XYZ	xyz(5.4432, 4.4066, 19.9617)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18377D #7D5E18

analogous

#186A7D #18377D #2C187D

triadic

#18377D #7D1837 #377D18

tetradic

#18377D #7D186A #7D5E18 #187D2C

square

#18377D #7D186A #7D5E18 #187D2C

split-complementary

#18377D #7D2C18 #6A7D18

monochromatic

#050B1A #0E204A #18377D #224EB0 #3768D9

Accessibility & contrast

On white

11.16

#18377D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#18377D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18377D

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18377D	#FFFFFF	#000000	##FFFFFF
##18377D	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00407F

Deuteranopia (green-blind)

#00377C

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #18377d;
/* rgb */ color: rgb(24, 55, 125);
/* oklch */ color: oklch(35.9% 0.125 263.4);

Tailwind

colors: {
  custom: {
    50: '#666da3',
    500: '#18377d',
    950: '#000000',
  },
}

SCSS

$custom: #18377d;
$custom-light: #666da3;
$custom-dark: #000000;

JSON

{
  "hex": "#18377d",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 125
  },
  "hsl": {
    "h": 221.584,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3589,
    "c": 0.12472,
    "h": 263.4
  },
  "luminance": 0.04407
}

Semantic roles & 50–950 ramp

primary

#18377D

secondary

#B28E3F

accent

#B53DEB

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #18377D

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

Preview Lab → · Contrast checker → · Palette generator →