#183CB4#183CB4

#183CB4 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.193 H 265.2°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#183CB4
RGB	rgb(24, 60, 180)
HSL	hsl(226, 76%, 40%)
HSV	hsv(226, 87%, 71%)
CMYK	cmyk(86.7%, 66.7%, 0%, 29.4%)
CIE-LAB	lab(31.16, 34.54, -66.47)
CIE-LCH	lch(31.16, 74.91, 297.46°)
OKLab	oklab(41.99% -0.016 -0.1927)
OKLCH	oklch(41.99% 0.193 265.2)
XYZ	xyz(10.2279, 6.7199, 43.9292)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183CB4 #B49018

analogous

#188AB4 #183CB4 #4218B4

triadic

#183CB4 #B4183C #3CB418

tetradic

#183CB4 #B4188A #B49018 #18B442

square

#183CB4 #B4188A #B49018 #18B442

split-complementary

#183CB4 #B44218 #8AB418

monochromatic

#0A1848 #112A7E #183CB4 #2752E2 #5D7DE9

Accessibility & contrast

On white

8.96

#183CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#183CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183CB4

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183CB4	#FFFFFF	#000000	##FFFFFF
##183CB4	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0042B2

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #183cb4;
/* rgb */ color: rgb(24, 60, 180);
/* oklch */ color: oklch(42.0% 0.193 265.2);

Tailwind

colors: {
  custom: {
    50: '#7571cc',
    500: '#183cb4',
    950: '#000000',
  },
}

SCSS

$custom: #183cb4;
$custom-light: #7571cc;
$custom-dark: #000000;

JSON

{
  "hex": "#183cb4",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 180
  },
  "hsl": {
    "h": 226.154,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.41994,
    "c": 0.19335,
    "h": 265.2
  },
  "luminance": 0.06721
}

Semantic roles & 50–950 ramp

primary

#183CB4

secondary

#CDB35B

accent

#C735F3

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #183CB4

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

Preview Lab → · Contrast checker → · Palette generator →