#288CA4#288CA4

#288CA4 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.5% C 0.095 H 217.8°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#288CA4
RGB	rgb(40, 140, 164)
HSL	hsl(192, 61%, 40%)
HSV	hsv(192, 76%, 64%)
CMYK	cmyk(75.6%, 14.6%, 0%, 35.7%)
CIE-LAB	lab(53.91, -19.87, -20.83)
CIE-LCH	lch(53.91, 28.79, 226.35°)
OKLab	oklab(59.47% -0.0751 -0.0582)
OKLCH	oklch(59.47% 0.095 217.8)
XYZ	xyz(16.9512, 21.8856, 38.4457)
Luminance	0.2189 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CA4 #A44028

analogous

#28A47E #288CA4 #284EA4

triadic

#288CA4 #A4288C #8CA428

tetradic

#288CA4 #7E28A4 #A44028 #4EA428

square

#288CA4 #7E28A4 #A44028 #4EA428

split-complementary

#288CA4 #A4284E #A47E28

monochromatic

#103842 #1C6273 #288CA4 #3AB2CF #6BC5DB

Accessibility & contrast

On white

3.91

#288CA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#288CA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CA4

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CA4	#FFFFFF	#000000	##000000
##288CA4	1.00	3.91	5.38	5.38
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C88A5

Deuteranopia (green-blind)

#6C7CA4

Tritanopia (blue-blind)

#009494

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #288ca4;
/* rgb */ color: rgb(40, 140, 164);
/* oklch */ color: oklch(59.5% 0.095 217.8);

Tailwind

colors: {
  custom: {
    50: '#75adbf',
    500: '#288ca4',
    950: '#000000',
  },
}

SCSS

$custom: #288ca4;
$custom-light: #75adbf;
$custom-dark: #000000;

JSON

{
  "hex": "#288ca4",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 164
  },
  "hsl": {
    "h": 191.613,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.59466,
    "c": 0.09502,
    "h": 217.8
  },
  "luminance": 0.21888
}

Semantic roles & 50–950 ramp

primary

#288CA4

secondary

#C17866

accent

#6344E4

background

#F7FAFB

surface

#EEF4F7

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288CA4

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

Preview Lab → · Contrast checker → · Palette generator →