#255B66#255B66

#255B66 is a dark, muted cyan. Relative luminance 0.088; OKLCH L 44.0% C 0.059 H 213.1°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#255B66
RGB	rgb(37, 91, 102)
HSL	hsl(190, 47%, 27%)
HSV	hsv(190, 64%, 40%)
CMYK	cmyk(63.7%, 10.8%, 0%, 60%)
CIE-LAB	lab(35.66, -14.09, -11.65)
CIE-LCH	lch(35.66, 18.29, 219.59°)
OKLab	oklab(43.99% -0.0495 -0.0323)
OKLCH	oklch(43.99% 0.059 213.1)
XYZ	xyz(6.9013, 8.8341, 13.9092)
Luminance	0.0883 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255B66 #663025

analogous

#256651 #255B66 #253A66

triadic

#255B66 #66255B #5B6625

tetradic

#255B66 #512566 #663025 #3A6625

square

#255B66 #512566 #663025 #3A6625

split-complementary

#255B66 #66253A #665125

monochromatic

#081416 #153339 #255B66 #358393 #49A9BD

Accessibility & contrast

On white

7.59

#255B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#255B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #255B66

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255B66	#FFFFFF	#000000	##FFFFFF
##255B66	1.00	7.59	2.77	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#535867

Deuteranopia (green-blind)

#495166

Tritanopia (blue-blind)

#005F5E

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #255b66;
/* rgb */ color: rgb(37, 91, 102);
/* oklch */ color: oklch(44.0% 0.059 213.1);

Tailwind

colors: {
  custom: {
    50: '#678991',
    500: '#255b66',
    950: '#000000',
  },
}

SCSS

$custom: #255b66;
$custom-light: #678991;
$custom-dark: #000000;

JSON

{
  "hex": "#255b66",
  "rgb": {
    "r": 37,
    "g": 91,
    "b": 102
  },
  "hsl": {
    "h": 190.154,
    "s": 46.763,
    "l": 27.255
  },
  "oklch": {
    "l": 0.43985,
    "c": 0.05915,
    "h": 213.1
  },
  "luminance": 0.08835
}

Semantic roles & 50–950 ramp

primary

#255B66

secondary

#995A4E

accent

#6851D6

background

#F6F8F8

surface

#EBF0F0

border

#C6CBCB

text

#060B0C

muted

#7A7C7D

Preview Lab

Preview with #255B66

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

Preview Lab → · Contrast checker → · Palette generator →