#288BA1#288BA1

#288BA1 is a mid, moderate cyan. Relative luminance 0.215; OKLCH L 59.1% C 0.093 H 216.2°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#288BA1
RGB	rgb(40, 139, 161)
HSL	hsl(191, 60%, 39%)
HSV	hsv(191, 75%, 63%)
CMYK	cmyk(75.2%, 13.7%, 0%, 36.9%)
CIE-LAB	lab(53.48, -20.34, -19.76)
CIE-LCH	lch(53.48, 28.36, 224.17°)
OKLab	oklab(59.09% -0.0753 -0.0551)
OKLCH	oklch(59.09% 0.093 216.2)
XYZ	xyz(16.5380, 21.4876, 36.9872)
Luminance	0.2149 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288BA1 #A13E28

analogous

#28A17B #288BA1 #284FA1

triadic

#288BA1 #A1288B #8BA128

tetradic

#288BA1 #7B28A1 #A13E28 #4FA128

square

#288BA1 #7B28A1 #A13E28 #4FA128

split-complementary

#288BA1 #A1284F #A17B28

monochromatic

#10363F #1C6170 #288BA1 #39B3CE #6AC5DA

Accessibility & contrast

On white

3.96

#288BA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#288BA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288BA1

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288BA1	#FFFFFF	#000000	##000000
##288BA1	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C87A2

Deuteranopia (green-blind)

#6C7BA1

Tritanopia (blue-blind)

#009392

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #288ba1;
/* rgb */ color: rgb(40, 139, 161);
/* oklch */ color: oklch(59.1% 0.093 216.2);

Tailwind

colors: {
  custom: {
    50: '#75adbc',
    500: '#288ba1',
    950: '#000000',
  },
}

SCSS

$custom: #288ba1;
$custom-light: #75adbc;
$custom-dark: #000000;

JSON

{
  "hex": "#288ba1",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 161
  },
  "hsl": {
    "h": 190.909,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.59085,
    "c": 0.09336,
    "h": 216.2
  },
  "luminance": 0.2149
}

Semantic roles & 50–950 ramp

primary

#288BA1

secondary

#C07565

accent

#6144E3

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288BA1

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

Preview Lab → · Contrast checker → · Palette generator →