#288DA3#288DA3

#288DA3 is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 59.7% C 0.094 H 215.9°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#288DA3
RGB	rgb(40, 141, 163)
HSL	hsl(191, 61%, 40%)
HSV	hsv(191, 75%, 64%)
CMYK	cmyk(75.5%, 13.5%, 0%, 36.1%)
CIE-LAB	lab(54.18, -20.74, -19.84)
CIE-LCH	lch(54.18, 28.70, 223.73°)
OKLab	oklab(59.67% -0.0765 -0.0553)
OKLCH	oklch(59.67% 0.094 215.9)
XYZ	xyz(17.0080, 22.1432, 38.0209)
Luminance	0.2215 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288DA3 #A33E28

analogous

#28A37C #288DA3 #284FA3

triadic

#288DA3 #A3288D #8DA328

tetradic

#288DA3 #7C28A3 #A33E28 #4FA328

square

#288DA3 #7C28A3 #A33E28 #4FA328

split-complementary

#288DA3 #A3284F #A37C28

monochromatic

#103841 #1C6272 #288DA3 #3AB4CF #6BC7DB

Accessibility & contrast

On white

3.87

#288DA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#288DA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288DA3

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288DA3	#FFFFFF	#000000	##000000
##288DA3	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E89A4

Deuteranopia (green-blind)

#6D7CA3

Tritanopia (blue-blind)

#009594

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288da3;
/* rgb */ color: rgb(40, 141, 163);
/* oklch */ color: oklch(59.7% 0.094 215.9);

Tailwind

colors: {
  custom: {
    50: '#75aebe',
    500: '#288da3',
    950: '#000000',
  },
}

SCSS

$custom: #288da3;
$custom-light: #75aebe;
$custom-dark: #000000;

JSON

{
  "hex": "#288da3",
  "rgb": {
    "r": 40,
    "g": 141,
    "b": 163
  },
  "hsl": {
    "h": 190.732,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59673,
    "c": 0.09446,
    "h": 215.9
  },
  "luminance": 0.22145
}

Semantic roles & 50–950 ramp

primary

#288DA3

secondary

#C17666

accent

#6144E4

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288DA3

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

Preview Lab → · Contrast checker → · Palette generator →