#183C7F#183C7F

#183C7F is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.2% C 0.121 H 261.4°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#183C7F
RGB	rgb(24, 60, 127)
HSL	hsl(219, 68%, 30%)
HSV	hsv(219, 81%, 50%)
CMYK	cmyk(81.1%, 52.8%, 0%, 50.2%)
CIE-LAB	lab(26.61, 13.42, -41.57)
CIE-LCH	lch(26.61, 43.69, 287.89°)
OKLab	oklab(37.19% -0.018 -0.1197)
OKLCH	oklch(37.19% 0.121 261.4)
XYZ	xyz(5.8219, 4.9575, 20.7246)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C7F #7F5B18

analogous

#18707F #183C7F #27187F

triadic

#183C7F #7F183C #3C7F18

tetradic

#183C7F #7F1870 #7F5B18 #187F27

square

#183C7F #7F1870 #7F5B18 #187F27

split-complementary

#183C7F #7F2718 #707F18

monochromatic

#050C1A #0E244C #183C7F #2254B2 #3870D9

Accessibility & contrast

On white

10.54

#183C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C7F

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C7F	#FFFFFF	#000000	##FFFFFF
##183C7F	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#114481

Deuteranopia (green-blind)

#003A7E

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183c7f;
/* rgb */ color: rgb(24, 60, 127);
/* oklch */ color: oklch(37.2% 0.121 261.4);

Tailwind

colors: {
  custom: {
    50: '#6671a5',
    500: '#183c7f',
    950: '#000000',
  },
}

SCSS

$custom: #183c7f;
$custom-light: #6671a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183c7f",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 127
  },
  "hsl": {
    "h": 219.029,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37187,
    "c": 0.12103,
    "h": 261.4
  },
  "luminance": 0.04958
}

Semantic roles & 50–950 ramp

primary

#183C7F

secondary

#B38B3F

accent

#AE3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183C7F

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

Preview Lab → · Contrast checker → · Palette generator →