#288CB6#288CB6

#288CB6 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.3% C 0.109 H 231.1°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#288CB6
RGB	rgb(40, 140, 182)
HSL	hsl(198, 64%, 44%)
HSV	hsv(198, 78%, 71%)
CMYK	cmyk(78%, 23.1%, 0%, 28.6%)
CIE-LAB	lab(54.64, -13.71, -30.02)
CIE-LCH	lch(54.64, 33.00, 245.46°)
OKLab	oklab(60.3% -0.0682 -0.0845)
OKLCH	oklch(60.3% 0.109 231.1)
XYZ	xyz(18.6932, 22.5824, 47.6205)
Luminance	0.2258 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CB6 #B65228

analogous

#28B699 #288CB6 #2845B6

triadic

#288CB6 #B6288C #8CB628

tetradic

#288CB6 #9928B6 #B65228 #45B628

square

#288CB6 #9928B6 #B65228 #45B628

split-complementary

#288CB6 #B62845 #B69928

monochromatic

#123F52 #1D6584 #288CB6 #45ABD6 #77C2E1

Accessibility & contrast

On white

3.81

#288CB6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#288CB6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB6

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CB6	#FFFFFF	#000000	##000000
##288CB6	1.00	3.81	5.52	5.52
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778AB8

Deuteranopia (green-blind)

#647DB5

Tritanopia (blue-blind)

#00979A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #288cb6;
/* rgb */ color: rgb(40, 140, 182);
/* oklch */ color: oklch(60.3% 0.109 231.1);

Tailwind

colors: {
  custom: {
    50: '#78adcc',
    500: '#288cb6',
    950: '#000000',
  },
}

SCSS

$custom: #288cb6;
$custom-light: #78adcc;
$custom-dark: #000000;

JSON

{
  "hex": "#288cb6",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 182
  },
  "hsl": {
    "h": 197.746,
    "s": 63.964,
    "l": 43.529
  },
  "oklch": {
    "l": 0.60297,
    "c": 0.10858,
    "h": 231.1
  },
  "luminance": 0.22585
}

Semantic roles & 50–950 ramp

primary

#288CB6

secondary

#C98B71

accent

#7241E7

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288CB6

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

Preview Lab → · Contrast checker → · Palette generator →