#183C8E#183C8E

#183C8E is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.142 H 263.3°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#183C8E
RGB	rgb(24, 60, 142)
HSL	hsl(222, 71%, 33%)
HSV	hsv(222, 83%, 56%)
CMYK	cmyk(83.1%, 57.7%, 0%, 44.3%)
CIE-LAB	lab(27.79, 19.58, -49.00)
CIE-LCH	lch(27.79, 52.77, 291.78°)
OKLab	oklab(38.45% -0.0165 -0.1415)
OKLCH	oklch(38.45% 0.142 263.3)
XYZ	xyz(6.8733, 5.3781, 26.2618)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C8E #8E6A18

analogous

#18778E #183C8E #2F188E

triadic

#183C8E #8E183C #3C8E18

tetradic

#183C8E #8E1877 #8E6A18 #188E2F

square

#183C8E #8E1877 #8E6A18 #188E2F

split-complementary

#183C8E #8E2F18 #778E18

monochromatic

#061025 #0F265A #183C8E #2152C2 #4171DF

Accessibility & contrast

On white

10.12

#183C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#183C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C8E

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C8E	#FFFFFF	#000000	##FFFFFF
##183C8E	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003C8C

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #183c8e;
/* rgb */ color: rgb(24, 60, 142);
/* oklch */ color: oklch(38.4% 0.142 263.3);

Tailwind

colors: {
  custom: {
    50: '#6a71b0',
    500: '#183c8e',
    950: '#000000',
  },
}

SCSS

$custom: #183c8e;
$custom-light: #6a71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#183c8e",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 142
  },
  "hsl": {
    "h": 221.695,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38446,
    "c": 0.14248,
    "h": 263.3
  },
  "luminance": 0.05379
}

Semantic roles & 50–950 ramp

primary

#183C8E

secondary

#C09942

accent

#B73AEE

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #183C8E

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

Preview Lab → · Contrast checker → · Palette generator →