#180D58#180D58

#180D58 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.1% C 0.124 H 278.3°. Best body text is #FFFFFF at 16.97:1 contrast (WCAG AA passes).

Color values

HEX	#180D58
RGB	rgb(24, 13, 88)
HSL	hsl(249, 74%, 20%)
HSV	hsv(249, 85%, 35%)
CMYK	cmyk(72.7%, 85.2%, 0%, 65.5%)
CIE-LAB	lab(10.46, 30.20, -42.59)
CIE-LCH	lch(10.46, 52.21, 305.34°)
OKLab	oklab(24.15% 0.0178 -0.123)
OKLCH	oklch(24.15% 0.124 278.3)
XYZ	xyz(2.2815, 1.1864, 9.3394)
Luminance	0.0119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180D58 #4D580D

analogous

#0D2858 #180D58 #3E0D58

triadic

#180D58 #58180D #0D5818

tetradic

#180D58 #580D28 #4D580D #0D583E

square

#180D58 #580D28 #4D580D #0D583E

split-complementary

#180D58 #583E0D #28580D

monochromatic

#07041B #090523 #180D58 #27158D #351DC3

Accessibility & contrast

On white

16.97

#180D58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#180D58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180D58

16.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180D58	#FFFFFF	#000000	##FFFFFF
##180D58	1.00	16.97	1.24	16.97
#FFFFFF	16.97	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F5A

Deuteranopia (green-blind)

#001957

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180d58;
/* rgb */ color: rgb(24, 13, 88);
/* oklch */ color: oklch(24.1% 0.124 278.3);

Tailwind

colors: {
  custom: {
    50: '#604e88',
    500: '#180d58',
    950: '#000000',
  },
}

SCSS

$custom: #180d58;
$custom-light: #604e88;
$custom-dark: #000000;

JSON

{
  "hex": "#180d58",
  "rgb": {
    "r": 24,
    "g": 13,
    "b": 88
  },
  "hsl": {
    "h": 248.8,
    "s": 74.257,
    "l": 19.804
  },
  "oklch": {
    "l": 0.2415,
    "c": 0.12431,
    "h": 278.3
  },
  "luminance": 0.01187
}

Semantic roles & 50–950 ramp

primary

#180D58

secondary

#84932E

accent

#F137D6

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #180D58

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

Preview Lab → · Contrast checker → · Palette generator →