#288FA5#288FA5

#288FA5 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.3% C 0.096 H 215.6°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#288FA5
RGB	rgb(40, 143, 165)
HSL	hsl(191, 61%, 40%)
HSV	hsv(191, 76%, 65%)
CMYK	cmyk(75.8%, 13.3%, 0%, 35.3%)
CIE-LAB	lab(54.88, -21.13, -19.92)
CIE-LCH	lch(54.88, 29.04, 223.31°)
OKLab	oklab(60.26% -0.0777 -0.0556)
OKLCH	oklch(60.26% 0.096 215.6)
XYZ	xyz(17.4862, 22.8106, 39.0713)
Luminance	0.2281 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288FA5 #A53E28

analogous

#28A57C #288FA5 #2850A5

triadic

#288FA5 #A5288F #8FA528

tetradic

#288FA5 #7C28A5 #A53E28 #50A528

square

#288FA5 #7C28A5 #A53E28 #50A528

split-complementary

#288FA5 #A52850 #A57C28

monochromatic

#103A42 #1C6474 #288FA5 #3BB5CF #6CC8DB

Accessibility & contrast

On white

3.78

#288FA5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#288FA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288FA5

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288FA5	#FFFFFF	#000000	##000000
##288FA5	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#808AA6

Deuteranopia (green-blind)

#6F7EA5

Tritanopia (blue-blind)

#009796

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #288fa5;
/* rgb */ color: rgb(40, 143, 165);
/* oklch */ color: oklch(60.3% 0.096 215.6);

Tailwind

colors: {
  custom: {
    50: '#76b0bf',
    500: '#288fa5',
    950: '#000000',
  },
}

SCSS

$custom: #288fa5;
$custom-light: #76b0bf;
$custom-dark: #000000;

JSON

{
  "hex": "#288fa5",
  "rgb": {
    "r": 40,
    "g": 143,
    "b": 165
  },
  "hsl": {
    "h": 190.56,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.6026,
    "c": 0.09556,
    "h": 215.6
  },
  "luminance": 0.22813
}

Semantic roles & 50–950 ramp

primary

#288FA5

secondary

#C27767

accent

#6044E4

background

#F7FAFB

surface

#EEF4F7

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288FA5

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

Preview Lab → · Contrast checker → · Palette generator →