#180F55#180F55

#180F55 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 24.1% C 0.118 H 278.5°. Best body text is #FFFFFF at 16.96:1 contrast (WCAG AA passes).

Color values

HEX	#180F55
RGB	rgb(24, 15, 85)
HSL	hsl(248, 70%, 20%)
HSV	hsv(248, 82%, 33%)
CMYK	cmyk(71.8%, 82.4%, 0%, 66.7%)
CIE-LAB	lab(10.49, 28.01, -40.49)
CIE-LCH	lch(10.49, 49.23, 304.67°)
OKLab	oklab(24.07% 0.0175 -0.1169)
OKLCH	oklch(24.07% 0.118 278.5)
XYZ	xyz(2.1867, 1.1915, 8.7073)
Luminance	0.0119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F55 #4C550F

analogous

#0F2955 #180F55 #3B0F55

triadic

#180F55 #55180F #0F5518

tetradic

#180F55 #550F29 #4C550F #0F553B

square

#180F55 #550F29 #4C550F #0F553B

split-complementary

#180F55 #553B0F #29550F

monochromatic

#07051A #090621 #180F55 #271889 #3521BD

Accessibility & contrast

On white

16.96

#180F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#180F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F55

16.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F55	#FFFFFF	#000000	##FFFFFF
##180F55	1.00	16.96	1.24	16.96
#FFFFFF	16.96	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F57

Deuteranopia (green-blind)

#001A54

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180f55;
/* rgb */ color: rgb(24, 15, 85);
/* oklch */ color: oklch(24.1% 0.118 278.5);

Tailwind

colors: {
  custom: {
    50: '#5f4f86',
    500: '#180f55',
    950: '#000000',
  },
}

SCSS

$custom: #180f55;
$custom-light: #5f4f86;
$custom-dark: #000000;

JSON

{
  "hex": "#180f55",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 85
  },
  "hsl": {
    "h": 247.714,
    "s": 70,
    "l": 19.608
  },
  "oklch": {
    "l": 0.24069,
    "c": 0.11824,
    "h": 278.5
  },
  "luminance": 0.01192
}

Semantic roles & 50–950 ramp

primary

#180F55

secondary

#838F31

accent

#ED3BD6

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #180F55

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

Preview Lab → · Contrast checker → · Palette generator →