#18255B#18255B

#18255B is a dark, moderate blue. Relative luminance 0.023; OKLCH L 28.9% C 0.098 H 269.2°. Best body text is #FFFFFF at 14.44:1 contrast (WCAG AA passes).

Color values

HEX	#18255B
RGB	rgb(24, 37, 91)
HSL	hsl(228, 58%, 23%)
HSV	hsv(228, 74%, 36%)
CMYK	cmyk(73.6%, 59.3%, 0%, 64.3%)
CIE-LAB	lab(16.86, 15.08, -34.12)
CIE-LCH	lch(16.86, 37.31, 293.84°)
OKLab	oklab(28.89% -0.0014 -0.0982)
OKLCH	oklch(28.89% 0.098 269.2)
XYZ	xyz(2.9259, 2.2724, 10.1799)
Luminance	0.0227 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18255B #5B4E18

analogous

#18475B #18255B #2C185B

triadic

#18255B #5B1825 #255B18

tetradic

#18255B #5B1847 #5B4E18 #185B2C

square

#18255B #5B1847 #5B4E18 #185B2C

split-complementary

#18255B #5B2C18 #475B18

monochromatic

#060A18 #0B112B #18255B #25398B #324CBC

Accessibility & contrast

On white

14.44

#18255B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#18255B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18255B

14.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18255B	#FFFFFF	#000000	##FFFFFF
##18255B	1.00	14.44	1.45	14.44
#FFFFFF	14.44	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D5D

Deuteranopia (green-blind)

#00275A

Tritanopia (blue-blind)

#00323C

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #18255b;
/* rgb */ color: rgb(24, 37, 91);
/* oklch */ color: oklch(28.9% 0.098 269.2);

Tailwind

colors: {
  custom: {
    50: '#5f5f8a',
    500: '#18255b',
    950: '#000000',
  },
}

SCSS

$custom: #18255b;
$custom-light: #5f5f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#18255b",
  "rgb": {
    "r": 24,
    "g": 37,
    "b": 91
  },
  "hsl": {
    "h": 228.358,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.28893,
    "c": 0.0982,
    "h": 269.2
  },
  "luminance": 0.02273
}

Semantic roles & 50–950 ramp

primary

#18255B

secondary

#92813D

accent

#C346E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05040C

muted

#79797D

Preview Lab

Preview with #18255B

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

Preview Lab → · Contrast checker → · Palette generator →