#288DA4#288DA4

#288DA4 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.7% C 0.095 H 216.7°. Best body text is #000000 at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#288DA4
RGB	rgb(40, 141, 164)
HSL	hsl(191, 61%, 40%)
HSV	hsv(191, 76%, 64%)
CMYK	cmyk(75.6%, 14%, 0%, 35.7%)
CIE-LAB	lab(54.22, -20.40, -20.36)
CIE-LCH	lch(54.22, 28.82, 224.93°)
OKLab	oklab(59.72% -0.0761 -0.0568)
OKLCH	oklch(59.72% 0.095 216.7)
XYZ	xyz(17.0980, 22.1792, 38.4946)
Luminance	0.2218 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288DA4 #A43F28

analogous

#28A47D #288DA4 #284FA4

triadic

#288DA4 #A4288D #8DA428

tetradic

#288DA4 #7D28A4 #A43F28 #4FA428

square

#288DA4 #7D28A4 #A43F28 #4FA428

split-complementary

#288DA4 #A4284F #A47D28

monochromatic

#103842 #1C6373 #288DA4 #3AB3CF #6BC6DB

Accessibility & contrast

On white

3.86

#288DA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.44

#288DA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288DA4

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288DA4	#FFFFFF	#000000	##000000
##288DA4	1.00	3.86	5.44	5.44
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.44	21.00	1.00	1.00
##000000	5.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E89A5

Deuteranopia (green-blind)

#6D7CA4

Tritanopia (blue-blind)

#009594

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288da4;
/* rgb */ color: rgb(40, 141, 164);
/* oklch */ color: oklch(59.7% 0.095 216.7);

Tailwind

colors: {
  custom: {
    50: '#75aebf',
    500: '#288da4',
    950: '#000000',
  },
}

SCSS

$custom: #288da4;
$custom-light: #75aebf;
$custom-dark: #000000;

JSON

{
  "hex": "#288da4",
  "rgb": {
    "r": 40,
    "g": 141,
    "b": 164
  },
  "hsl": {
    "h": 191.129,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.59716,
    "c": 0.095,
    "h": 216.7
  },
  "luminance": 0.22181
}

Semantic roles & 50–950 ramp

primary

#288DA4

secondary

#C17766

accent

#6244E4

background

#F7FAFB

surface

#EEF4F7

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288DA4

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

Preview Lab → · Contrast checker → · Palette generator →