#18587B#18587B

#18587B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 43.8% C 0.085 H 237.8°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#18587B
RGB	rgb(24, 88, 123)
HSL	hsl(201, 67%, 29%)
HSV	hsv(201, 80%, 48%)
CMYK	cmyk(80.5%, 28.5%, 0%, 51.8%)
CIE-LAB	lab(35.21, -6.84, -25.41)
CIE-LCH	lch(35.21, 26.31, 254.94°)
OKLab	oklab(43.82% -0.0453 -0.0718)
OKLCH	oklch(43.82% 0.085 237.8)
XYZ	xyz(7.4401, 8.6028, 20.0034)
Luminance	0.0860 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18587B #7B3B18

analogous

#187B6D #18587B #18277B

triadic

#18587B #7B1858 #587B18

tetradic

#18587B #6D187B #7B3B18 #277B18

square

#18587B #6D187B #7B3B18 #277B18

split-complementary

#18587B #7B1827 #7B6D18

monochromatic

#05121A #0E3348 #18587B #227DAE #369ED8

Accessibility & contrast

On white

7.72

#18587B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#18587B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18587B

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18587B	#FFFFFF	#000000	##FFFFFF
##18587B	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#47587D

Deuteranopia (green-blind)

#3A4F7A

Tritanopia (blue-blind)

#006164

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #18587b;
/* rgb */ color: rgb(24, 88, 123);
/* oklch */ color: oklch(43.8% 0.085 237.8);

Tailwind

colors: {
  custom: {
    50: '#6687a1',
    500: '#18587b',
    950: '#000000',
  },
}

SCSS

$custom: #18587b;
$custom-light: #6687a1;
$custom-dark: #000000;

JSON

{
  "hex": "#18587b",
  "rgb": {
    "r": 24,
    "g": 88,
    "b": 123
  },
  "hsl": {
    "h": 201.212,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.43817,
    "c": 0.08488,
    "h": 237.8
  },
  "luminance": 0.08604
}

Semantic roles & 50–950 ramp

primary

#18587B

secondary

#B0673F

accent

#7B3EEA

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #18587B

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

Preview Lab → · Contrast checker → · Palette generator →