#18539B#18539B

#18539B is a dark, vivid cyan. Relative luminance 0.087; OKLCH L 44.6% C 0.132 H 256.0°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#18539B
RGB	rgb(24, 83, 155)
HSL	hsl(213, 73%, 35%)
HSV	hsv(213, 85%, 61%)
CMYK	cmyk(84.5%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(35.49, 9.15, -44.47)
CIE-LCH	lch(35.49, 45.40, 281.63°)
OKLab	oklab(44.64% -0.0319 -0.1277)
OKLCH	oklch(44.64% 0.132 256)
XYZ	xyz(9.3841, 8.7461, 32.1976)
Luminance	0.0875 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18539B #9B6018

analogous

#18949B #18539B #1F189B

triadic

#18539B #9B1853 #539B18

tetradic

#18539B #9B1894 #9B6018 #189B1F

square

#18539B #9B1894 #9B6018 #189B1F

split-complementary

#18539B #9B1F18 #949B18

monochromatic

#081A31 #103766 #18539B #206FD0 #4A8FE3

Accessibility & contrast

On white

7.64

#18539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#18539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18539B

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18539B	#FFFFFF	#000000	##FFFFFF
##18539B	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5A9E

Deuteranopia (green-blind)

#0A4E9A

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #18539b;
/* rgb */ color: rgb(24, 83, 155);
/* oklch */ color: oklch(44.6% 0.132 256.0);

Tailwind

colors: {
  custom: {
    50: '#6d82b9',
    500: '#18539b',
    950: '#000000',
  },
}

SCSS

$custom: #18539b;
$custom-light: #6d82b9;
$custom-dark: #000000;

JSON

{
  "hex": "#18539b",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 212.977,
    "s": 73.184,
    "l": 35.098
  },
  "oklch": {
    "l": 0.44639,
    "c": 0.13162,
    "h": 256
  },
  "luminance": 0.08747
}

Semantic roles & 50–950 ramp

primary

#18539B

secondary

#C58D4A

accent

#9D38F0

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #18539B

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

Preview Lab → · Contrast checker → · Palette generator →