#18128C#18128C

#18128C is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.3% C 0.185 H 270.4°. Best body text is #FFFFFF at 13.96:1 contrast (WCAG AA passes).

Color values

HEX	#18128C
RGB	rgb(24, 18, 140)
HSL	hsl(243, 77%, 31%)
HSV	hsv(243, 87%, 55%)
CMYK	cmyk(82.9%, 87.1%, 0%, 45.1%)
CIE-LAB	lab(18.01, 44.74, -63.85)
CIE-LCH	lch(18.01, 77.97, 305.02°)
OKLab	oklab(31.3% 0.0014 -0.1847)
OKLCH	oklch(31.3% 0.185 270.4)
XYZ	xyz(5.3250, 2.5196, 25.0115)
Luminance	0.0252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18128C #868C12

analogous

#12498C #18128C #55128C

triadic

#18128C #8C1812 #128C18

tetradic

#18128C #8C1249 #868C12 #128C55

square

#18128C #8C1249 #868C12 #128C55

split-complementary

#18128C #8C5512 #498C12

monochromatic

#050420 #0F0B56 #18128C #2119C2 #3C34E5

Accessibility & contrast

On white

13.96

#18128C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#18128C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18128C

13.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18128C	#FFFFFF	#000000	##FFFFFF
##18128C	1.00	13.96	1.50	13.96
#FFFFFF	13.96	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328F

Deuteranopia (green-blind)

#00268A

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #18128c;
/* rgb */ color: rgb(24, 18, 140);
/* oklch */ color: oklch(31.3% 0.185 270.4);

Tailwind

colors: {
  custom: {
    50: '#6e55af',
    500: '#18128c',
    950: '#000000',
  },
}

SCSS

$custom: #18128c;
$custom-light: #6e55af;
$custom-dark: #000000;

JSON

{
  "hex": "#18128c",
  "rgb": {
    "r": 24,
    "g": 18,
    "b": 140
  },
  "hsl": {
    "h": 242.951,
    "s": 77.215,
    "l": 30.98
  },
  "oklch": {
    "l": 0.313,
    "c": 0.18476,
    "h": 270.4
  },
  "luminance": 0.0252
}

Semantic roles & 50–950 ramp

primary

#18128C

secondary

#BAC039

accent

#F434EA

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #18128C

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

Preview Lab → · Contrast checker → · Palette generator →