#183C9F#183C9F

#183C9F is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.166 H 264.5°. Best body text is #FFFFFF at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#183C9F
RGB	rgb(24, 60, 159)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 62%)
CMYK	cmyk(84.9%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(29.23, 26.41, -57.04)
CIE-LCH	lch(29.23, 62.86, 294.84°)
OKLab	oklab(39.98% -0.0158 -0.1651)
OKLCH	oklch(39.98% 0.166 264.5)
XYZ	xyz(8.2483, 5.9281, 33.5037)
Luminance	0.0593 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C9F #9F7B18

analogous

#187F9F #183C9F #37189F

triadic

#183C9F #9F183C #3C9F18

tetradic

#183C9F #9F187F #9F7B18 #189F37

square

#183C9F #9F187F #9F7B18 #189F37

split-complementary

#183C9F #9F3718 #7F9F18

monochromatic

#081435 #10286A #183C9F #2050D4 #4D75E4

Accessibility & contrast

On white

9.61

#183C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#183C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C9F

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C9F	#FFFFFF	#000000	##FFFFFF
##183C9F	1.00	9.61	2.19	9.61
#FFFFFF	9.61	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA2

Deuteranopia (green-blind)

#003F9D

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183c9f;
/* rgb */ color: rgb(24, 60, 159);
/* oklch */ color: oklch(40.0% 0.166 264.5);

Tailwind

colors: {
  custom: {
    50: '#6f71bc',
    500: '#183c9f',
    950: '#000000',
  },
}

SCSS

$custom: #183c9f;
$custom-light: #6f71bc;
$custom-dark: #000000;

JSON

{
  "hex": "#183c9f",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 224,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39978,
    "c": 0.16586,
    "h": 264.5
  },
  "luminance": 0.05929
}

Semantic roles & 50–950 ramp

primary

#183C9F

secondary

#C6A64D

accent

#BF37F0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183C9F

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

Preview Lab → · Contrast checker → · Palette generator →