#183CA0#183CA0

#183CA0 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.167 H 264.6°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#183CA0
RGB	rgb(24, 60, 160)
HSL	hsl(224, 74%, 36%)
HSV	hsv(224, 85%, 63%)
CMYK	cmyk(85%, 62.5%, 0%, 37.3%)
CIE-LAB	lab(29.32, 26.80, -57.50)
CIE-LCH	lch(29.32, 63.44, 294.99°)
OKLab	oklab(40.07% -0.0158 -0.1664)
OKLCH	oklch(40.07% 0.167 264.6)
XYZ	xyz(8.3355, 5.9629, 33.9625)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183CA0 #A07C18

analogous

#1880A0 #183CA0 #3818A0

triadic

#183CA0 #A0183C #3CA018

tetradic

#183CA0 #A01880 #A07C18 #18A038

square

#183CA0 #A01880 #A07C18 #18A038

split-complementary

#183CA0 #A03818 #80A018

monochromatic

#081436 #10286B #183CA0 #2050D5 #4E76E4

Accessibility & contrast

On white

9.58

#183CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#183CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183CA0

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183CA0	#FFFFFF	#000000	##FFFFFF
##183CA0	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#003F9E

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183ca0;
/* rgb */ color: rgb(24, 60, 160);
/* oklch */ color: oklch(40.1% 0.167 264.6);

Tailwind

colors: {
  custom: {
    50: '#6f71bd',
    500: '#183ca0',
    950: '#000000',
  },
}

SCSS

$custom: #183ca0;
$custom-light: #6f71bd;
$custom-dark: #000000;

JSON

{
  "hex": "#183ca0",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 160
  },
  "hsl": {
    "h": 224.118,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40071,
    "c": 0.1672,
    "h": 264.6
  },
  "luminance": 0.05964
}

Semantic roles & 50–950 ramp

primary

#183CA0

secondary

#C6A64D

accent

#C037F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183CA0

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

Preview Lab → · Contrast checker → · Palette generator →