#288EB1#288EB1

#288EB1 is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.5% C 0.104 H 226.0°. Best body text is #000000 at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#288EB1
RGB	rgb(40, 142, 177)
HSL	hsl(195, 63%, 43%)
HSV	hsv(195, 77%, 69%)
CMYK	cmyk(77.4%, 19.8%, 0%, 30.6%)
CIE-LAB	lab(55.04, -16.54, -26.54)
CIE-LCH	lch(55.04, 31.28, 238.06°)
OKLab	oklab(60.55% -0.072 -0.0745)
OKLCH	oklch(60.55% 0.104 226)
XYZ	xyz(18.4806, 22.9692, 45.0459)
Luminance	0.2297 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288EB1 #B14B28

analogous

#28B18F #288EB1 #284AB1

triadic

#288EB1 #B1288E #8EB128

tetradic

#288EB1 #8F28B1 #B14B28 #4AB128

square

#288EB1 #8F28B1 #B14B28 #4AB128

split-complementary

#288EB1 #B1284A #B18F28

monochromatic

#113E4D #1D667F #288EB1 #42AFD4 #74C4E0

Accessibility & contrast

On white

3.75

#288EB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.59

#288EB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288EB1

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288EB1	#FFFFFF	#000000	##000000
##288EB1	1.00	3.75	5.59	5.59
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.59	21.00	1.00	1.00
##000000	5.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8BB3

Deuteranopia (green-blind)

#697EB1

Tritanopia (blue-blind)

#009899

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #288eb1;
/* rgb */ color: rgb(40, 142, 177);
/* oklch */ color: oklch(60.5% 0.104 226.0);

Tailwind

colors: {
  custom: {
    50: '#77afc8',
    500: '#288eb1',
    950: '#000000',
  },
}

SCSS

$custom: #288eb1;
$custom-light: #77afc8;
$custom-dark: #000000;

JSON

{
  "hex": "#288eb1",
  "rgb": {
    "r": 40,
    "g": 142,
    "b": 177
  },
  "hsl": {
    "h": 195.328,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.60548,
    "c": 0.10358,
    "h": 226
  },
  "luminance": 0.22971
}

Semantic roles & 50–950 ramp

primary

#288EB1

secondary

#C7856E

accent

#6C42E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288EB1

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

Preview Lab → · Contrast checker → · Palette generator →