#18233B#18233B

#18233B is a dark, muted blue. Relative luminance 0.017; OKLCH L 25.9% C 0.048 H 264.6°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#18233B
RGB	rgb(24, 35, 59)
HSL	hsl(221, 42%, 16%)
HSV	hsv(221, 59%, 23%)
CMYK	cmyk(59.3%, 40.7%, 0%, 76.9%)
CIE-LAB	lab(13.90, 3.59, -16.95)
CIE-LCH	lch(13.90, 17.33, 281.96°)
OKLab	oklab(25.89% -0.0045 -0.0478)
OKLCH	oklch(25.89% 0.048 264.6)
XYZ	xyz(1.7669, 1.7119, 4.3741)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18233B #3B3018

analogous

#18353B #18233B #1F183B

triadic

#18233B #3B1823 #233B18

tetradic

#18233B #3B1835 #3B3018 #183B1F

square

#18233B #3B1835 #3B3018 #183B1F

split-complementary

#18233B #3B1F18 #353B18

monochromatic

#090D16 #090D16 #18233B #2A3D67 #3B5792

Accessibility & contrast

On white

15.64

#18233B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#18233B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18233B

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18233B	#FFFFFF	#000000	##FFFFFF
##18233B	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A253C

Deuteranopia (green-blind)

#16223A

Tritanopia (blue-blind)

#08282C

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #18233b;
/* rgb */ color: rgb(24, 35, 59);
/* oklch */ color: oklch(25.9% 0.048 264.6);

Tailwind

colors: {
  custom: {
    50: '#585d71',
    500: '#18233b',
    950: '#000000',
  },
}

SCSS

$custom: #18233b;
$custom-light: #585d71;
$custom-dark: #000000;

JSON

{
  "hex": "#18233b",
  "rgb": {
    "r": 24,
    "g": 35,
    "b": 59
  },
  "hsl": {
    "h": 221.143,
    "s": 42.169,
    "l": 16.275
  },
  "oklch": {
    "l": 0.2589,
    "c": 0.04803,
    "h": 264.6
  },
  "luminance": 0.01712
}

Semantic roles & 50–950 ramp

primary

#18233B

secondary

#71613E

accent

#AB56D2

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030407

muted

#78797A

Preview Lab

Preview with #18233B

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

Preview Lab → · Contrast checker → · Palette generator →