#180F5B#180F5B

#180F5B is a very dark, vivid blue. Relative luminance 0.013; OKLCH L 24.8% C 0.126 H 277.2°. Best body text is #FFFFFF at 16.69:1 contrast (WCAG AA passes).

Color values

HEX	#180F5B
RGB	rgb(24, 15, 91)
HSL	hsl(247, 72%, 21%)
HSV	hsv(247, 84%, 36%)
CMYK	cmyk(73.6%, 83.5%, 0%, 64.3%)
CIE-LAB	lab(11.21, 30.11, -43.37)
CIE-LCH	lch(11.21, 52.79, 304.77°)
OKLab	oklab(24.79% 0.0158 -0.1253)
OKLCH	oklch(24.79% 0.126 277.2)
XYZ	xyz(2.4352, 1.2910, 10.0163)
Luminance	0.0129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F5B #525B0F

analogous

#0F2C5B #180F5B #3E0F5B

triadic

#180F5B #5B180F #0F5B18

tetradic

#180F5B #5B0F2C #525B0F #0F5B3E

square

#180F5B #5B0F2C #525B0F #0F5B3E

split-complementary

#180F5B #5B3E0F #2C5B0F

monochromatic

#07041A #0A0626 #180F5B #261890 #3420C4

Accessibility & contrast

On white

16.69

#180F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#180F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F5B

16.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F5B	#FFFFFF	#000000	##FFFFFF
##180F5B	1.00	16.69	1.26	16.69
#FFFFFF	16.69	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215D

Deuteranopia (green-blind)

#001B5A

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #180f5b;
/* rgb */ color: rgb(24, 15, 91);
/* oklch */ color: oklch(24.8% 0.126 277.2);

Tailwind

colors: {
  custom: {
    50: '#614f8a',
    500: '#180f5b',
    950: '#000000',
  },
}

SCSS

$custom: #180f5b;
$custom-light: #614f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#180f5b",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 91
  },
  "hsl": {
    "h": 247.105,
    "s": 71.698,
    "l": 20.784
  },
  "oklch": {
    "l": 0.24785,
    "c": 0.12631,
    "h": 277.2
  },
  "luminance": 0.01291
}

Semantic roles & 50–950 ramp

primary

#180F5B

secondary

#899531

accent

#EE39D9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #180F5B

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

Preview Lab → · Contrast checker → · Palette generator →