#183E75#183E75

#183E75 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.104 H 258.1°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#183E75
RGB	rgb(24, 62, 117)
HSL	hsl(215, 66%, 28%)
HSV	hsv(215, 79%, 46%)
CMYK	cmyk(79.5%, 47%, 0%, 54.1%)
CIE-LAB	lab(26.51, 7.88, -35.43)
CIE-LCH	lch(26.51, 36.30, 282.53°)
OKLab	oklab(36.88% -0.0215 -0.1016)
OKLCH	oklch(36.88% 0.104 258.1)
XYZ	xyz(5.3090, 4.9232, 17.4966)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E75 #754F18

analogous

#186C75 #183E75 #211875

triadic

#183E75 #75183E #3E7518

tetradic

#183E75 #75186C #754F18 #187521

square

#183E75 #75186C #754F18 #187521

split-complementary

#183E75 #752118 #6C7518

monochromatic

#050D19 #0E2342 #183E75 #2259A8 #3275D5

Accessibility & contrast

On white

10.58

#183E75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#183E75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E75

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E75	#FFFFFF	#000000	##FFFFFF
##183E75	1.00	10.58	1.98	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224377

Deuteranopia (green-blind)

#0E3B74

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183e75;
/* rgb */ color: rgb(24, 62, 117);
/* oklch */ color: oklch(36.9% 0.104 258.1);

Tailwind

colors: {
  custom: {
    50: '#64729d',
    500: '#183e75',
    950: '#000000',
  },
}

SCSS

$custom: #183e75;
$custom-light: #64729d;
$custom-dark: #000000;

JSON

{
  "hex": "#183e75",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 117
  },
  "hsl": {
    "h": 215.484,
    "s": 65.957,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36883,
    "c": 0.1038,
    "h": 258.1
  },
  "luminance": 0.04924
}

Semantic roles & 50–950 ramp

primary

#183E75

secondary

#AA7E3F

accent

#A33FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183E75

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

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