#180C5B#180C5B

#180C5B is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.4% C 0.129 H 277.7°. Best body text is #FFFFFF at 16.90:1 contrast (WCAG AA passes).

Color values

HEX	#180C5B
RGB	rgb(24, 12, 91)
HSL	hsl(249, 77%, 20%)
HSV	hsv(249, 87%, 36%)
CMYK	cmyk(73.6%, 86.8%, 0%, 64.3%)
CIE-LAB	lab(10.65, 31.74, -44.30)
CIE-LCH	lch(10.65, 54.50, 305.62°)
OKLab	oklab(24.39% 0.0174 -0.128)
OKLCH	oklch(24.39% 0.129 277.7)
XYZ	xyz(2.3959, 1.2123, 10.0032)
Luminance	0.0121 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180C5B #4F5B0C

analogous

#0C275B #180C5B #3F0C5B

triadic

#180C5B #5B180C #0C5B18

tetradic

#180C5B #5B0C27 #4F5B0C #0C5B3F

square

#180C5B #5B0C27 #4F5B0C #0C5B3F

split-complementary

#180C5B #5B3F0C #275B0C

monochromatic

#07041B #0A0525 #180C5B #261391 #351AC7

Accessibility & contrast

On white

16.90

#180C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#180C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180C5B

16.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180C5B	#FFFFFF	#000000	##FFFFFF
##180C5B	1.00	16.90	1.24	16.90
#FFFFFF	16.90	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205D

Deuteranopia (green-blind)

#00195A

Tritanopia (blue-blind)

#002534

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #180c5b;
/* rgb */ color: rgb(24, 12, 91);
/* oklch */ color: oklch(24.4% 0.129 277.7);

Tailwind

colors: {
  custom: {
    50: '#614e8a',
    500: '#180c5b',
    950: '#000000',
  },
}

SCSS

$custom: #180c5b;
$custom-light: #614e8a;
$custom-dark: #000000;

JSON

{
  "hex": "#180c5b",
  "rgb": {
    "r": 24,
    "g": 12,
    "b": 91
  },
  "hsl": {
    "h": 249.114,
    "s": 76.699,
    "l": 20.196
  },
  "oklch": {
    "l": 0.24392,
    "c": 0.12917,
    "h": 277.7
  },
  "luminance": 0.01212
}

Semantic roles & 50–950 ramp

primary

#180C5B

secondary

#86962D

accent

#F335D6

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06010C

muted

#7A777D

Preview Lab

Preview with #180C5B

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

Preview Lab → · Contrast checker → · Palette generator →