#180C58#180C58

#180C58 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.0% C 0.125 H 278.4°. Best body text is #FFFFFF at 17.04:1 contrast (WCAG AA passes).

Color values

HEX	#180C58
RGB	rgb(24, 12, 88)
HSL	hsl(249, 76%, 20%)
HSV	hsv(249, 86%, 35%)
CMYK	cmyk(72.7%, 86.4%, 0%, 65.5%)
CIE-LAB	lab(10.27, 30.73, -42.90)
CIE-LCH	lch(10.27, 52.77, 305.62°)
OKLab	oklab(24.02% 0.0184 -0.1239)
OKLCH	oklch(24.02% 0.125 278.4)
XYZ	xyz(2.2690, 1.1615, 9.3352)
Luminance	0.0116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180C58 #4C580C

analogous

#0C2658 #180C58 #3E0C58

triadic

#180C58 #58180C #0C5818

tetradic

#180C58 #580C26 #4C580C #0C583E

square

#180C58 #580C26 #4C580C #0C583E

split-complementary

#180C58 #583E0C #26580C

monochromatic

#07041B #090522 #180C58 #27138E #351BC4

Accessibility & contrast

On white

17.04

#180C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#180C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180C58

17.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180C58	#FFFFFF	#000000	##FFFFFF
##180C58	1.00	17.04	1.23	17.04
#FFFFFF	17.04	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F5A

Deuteranopia (green-blind)

#001957

Tritanopia (blue-blind)

#002332

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180c58;
/* rgb */ color: rgb(24, 12, 88);
/* oklch */ color: oklch(24.0% 0.125 278.4);

Tailwind

colors: {
  custom: {
    50: '#604d88',
    500: '#180c58',
    950: '#000000',
  },
}

SCSS

$custom: #180c58;
$custom-light: #604d88;
$custom-dark: #000000;

JSON

{
  "hex": "#180c58",
  "rgb": {
    "r": 24,
    "g": 12,
    "b": 88
  },
  "hsl": {
    "h": 249.474,
    "s": 76,
    "l": 19.608
  },
  "oklch": {
    "l": 0.2402,
    "c": 0.12526,
    "h": 278.4
  },
  "luminance": 0.01162
}

Semantic roles & 50–950 ramp

primary

#180C58

secondary

#83932D

accent

#F335D5

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #180C58

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

Preview Lab → · Contrast checker → · Palette generator →