#18178C#18178C

#18178C is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.181 H 270.1°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#18178C
RGB	rgb(24, 23, 140)
HSL	hsl(241, 72%, 32%)
HSV	hsv(241, 84%, 55%)
CMYK	cmyk(82.9%, 83.6%, 0%, 45.1%)
CIE-LAB	lab(18.80, 42.40, -62.54)
CIE-LCH	lch(18.80, 75.56, 304.14°)
OKLab	oklab(31.85% 0.0004 -0.181)
OKLCH	oklch(31.85% 0.181 270.1)
XYZ	xyz(5.4151, 2.6998, 25.0416)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18178C #8B8C17

analogous

#17518C #18178C #53178C

triadic

#18178C #8C1817 #178C18

tetradic

#18178C #8C1751 #8B8C17 #178C53

square

#18178C #8C1751 #8B8C17 #178C53

split-complementary

#18178C #8C5317 #518C17

monochromatic

#060623 #0F0E57 #18178C #2120C1 #3F3EDF

Accessibility & contrast

On white

13.64

#18178C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#18178C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18178C

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18178C	#FFFFFF	#000000	##FFFFFF
##18178C	1.00	13.64	1.54	13.64
#FFFFFF	13.64	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348F

Deuteranopia (green-blind)

#00288A

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #18178c;
/* rgb */ color: rgb(24, 23, 140);
/* oklch */ color: oklch(31.8% 0.181 270.1);

Tailwind

colors: {
  custom: {
    50: '#6d57af',
    500: '#18178c',
    950: '#000000',
  },
}

SCSS

$custom: #18178c;
$custom-light: #6d57af;
$custom-dark: #000000;

JSON

{
  "hex": "#18178c",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 140
  },
  "hsl": {
    "h": 240.513,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.31847,
    "c": 0.18105,
    "h": 270.1
  },
  "luminance": 0.027
}

Semantic roles & 50–950 ramp

primary

#18178C

secondary

#BEBF3F

accent

#EF39ED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #18178C

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

Preview Lab → · Contrast checker → · Palette generator →