#183E8B#183E8B

#183E8B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.136 H 262.3°. Best body text is #FFFFFF at 10.00:1 contrast (WCAG AA passes).

Color values

HEX	#183E8B
RGB	rgb(24, 62, 139)
HSL	hsl(220, 71%, 32%)
HSV	hsv(220, 83%, 55%)
CMYK	cmyk(82.7%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(28.12, 16.96, -46.60)
CIE-LCH	lch(28.12, 49.59, 290.00°)
OKLab	oklab(38.63% -0.0182 -0.1344)
OKLCH	oklch(38.63% 0.136 262.3)
XYZ	xyz(6.7578, 5.5027, 25.1271)
Luminance	0.0550 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E8B #8B6518

analogous

#18788B #183E8B #2C188B

triadic

#183E8B #8B183E #3E8B18

tetradic

#183E8B #8B1878 #8B6518 #188B2C

square

#183E8B #8B1878 #8B6518 #188B2C

split-complementary

#183E8B #8B2C18 #788B18

monochromatic

#060F23 #0F2757 #183E8B #2155BF #3F74DE

Accessibility & contrast

On white

10.00

#183E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#183E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E8B

10.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E8B	#FFFFFF	#000000	##FFFFFF
##183E8B	1.00	10.00	2.10	10.00
#FFFFFF	10.00	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183e8b;
/* rgb */ color: rgb(24, 62, 139);
/* oklch */ color: oklch(38.6% 0.136 262.3);

Tailwind

colors: {
  custom: {
    50: '#6a72ad',
    500: '#183e8b',
    950: '#000000',
  },
}

SCSS

$custom: #183e8b;
$custom-light: #6a72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#183e8b",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 220.174,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38625,
    "c": 0.13566,
    "h": 262.3
  },
  "luminance": 0.05504
}

Semantic roles & 50–950 ramp

primary

#183E8B

secondary

#BE9540

accent

#B23AED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #183E8B

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

Preview Lab → · Contrast checker → · Palette generator →