#180F58#180F58

#180F58 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.4% C 0.122 H 277.8°. Best body text is #FFFFFF at 16.83:1 contrast (WCAG AA passes).

Color values

HEX	#180F58
RGB	rgb(24, 15, 88)
HSL	hsl(247, 71%, 20%)
HSV	hsv(247, 83%, 35%)
CMYK	cmyk(72.7%, 83%, 0%, 65.5%)
CIE-LAB	lab(10.85, 29.06, -41.94)
CIE-LCH	lch(10.85, 51.02, 304.72°)
OKLab	oklab(24.43% 0.0167 -0.1211)
OKLCH	oklch(24.43% 0.122 277.8)
XYZ	xyz(2.3084, 1.2402, 9.3484)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F58 #4F580F

analogous

#0F2B58 #180F58 #3C0F58

triadic

#180F58 #58180F #0F5818

tetradic

#180F58 #580F2B #4F580F #0F583C

square

#180F58 #580F2B #4F580F #0F583C

split-complementary

#180F58 #583C0F #2B580F

monochromatic

#07041A #0A0624 #180F58 #26188C #3521C1

Accessibility & contrast

On white

16.83

#180F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#180F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F58

16.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F58	#FFFFFF	#000000	##FFFFFF
##180F58	1.00	16.83	1.25	16.83
#FFFFFF	16.83	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205A

Deuteranopia (green-blind)

#001A57

Tritanopia (blue-blind)

#002533

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #180f58;
/* rgb */ color: rgb(24, 15, 88);
/* oklch */ color: oklch(24.4% 0.122 277.8);

Tailwind

colors: {
  custom: {
    50: '#604f88',
    500: '#180f58',
    950: '#000000',
  },
}

SCSS

$custom: #180f58;
$custom-light: #604f88;
$custom-dark: #000000;

JSON

{
  "hex": "#180f58",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 88
  },
  "hsl": {
    "h": 247.397,
    "s": 70.874,
    "l": 20.196
  },
  "oklch": {
    "l": 0.24425,
    "c": 0.12229,
    "h": 277.8
  },
  "luminance": 0.0124
}

Semantic roles & 50–950 ramp

primary

#180F58

secondary

#869231

accent

#EE3AD8

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020B

muted

#7A787C

Preview Lab

Preview with #180F58

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

Preview Lab → · Contrast checker → · Palette generator →