#180F53#180F53

#180F53 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.8% C 0.115 H 279.0°. Best body text is #FFFFFF at 17.05:1 contrast (WCAG AA passes).

Color values

HEX	#180F53
RGB	rgb(24, 15, 83)
HSL	hsl(248, 69%, 19%)
HSV	hsv(248, 82%, 33%)
CMYK	cmyk(71.1%, 81.9%, 0%, 67.5%)
CIE-LAB	lab(10.26, 27.29, -39.51)
CIE-LCH	lch(10.26, 48.02, 304.64°)
OKLab	oklab(23.83% 0.0181 -0.1141)
OKLCH	oklch(23.83% 0.115 279)
XYZ	xyz(2.1083, 1.1602, 8.2948)
Luminance	0.0116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F53 #4A530F

analogous

#0F2853 #180F53 #3A0F53

triadic

#180F53 #53180F #0F5318

tetradic

#180F53 #530F28 #4A530F #0F533A

square

#180F53 #530F28 #4A530F #0F533A

split-complementary

#180F53 #533A0F #28530F

monochromatic

#07051A #09061F #180F53 #271887 #3622BB

Accessibility & contrast

On white

17.05

#180F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#180F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F53

17.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F53	#FFFFFF	#000000	##FFFFFF
##180F53	1.00	17.05	1.23	17.05
#FFFFFF	17.05	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F55

Deuteranopia (green-blind)

#001952

Tritanopia (blue-blind)

#002330

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180f53;
/* rgb */ color: rgb(24, 15, 83);
/* oklch */ color: oklch(23.8% 0.115 279.0);

Tailwind

colors: {
  custom: {
    50: '#5f4f84',
    500: '#180f53',
    950: '#000000',
  },
}

SCSS

$custom: #180f53;
$custom-light: #5f4f84;
$custom-dark: #000000;

JSON

{
  "hex": "#180f53",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 83
  },
  "hsl": {
    "h": 247.941,
    "s": 69.388,
    "l": 19.216
  },
  "oklch": {
    "l": 0.23834,
    "c": 0.11549,
    "h": 279
  },
  "luminance": 0.0116
}

Semantic roles & 50–950 ramp

primary

#180F53

secondary

#818D31

accent

#EC3CD5

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #180F53

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

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