#288CB1#288CB1

#288CB1 is a mid, moderate cyan. Relative luminance 0.224; OKLCH L 60.1% C 0.104 H 227.8°. Best body text is #000000 at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#288CB1
RGB	rgb(40, 140, 177)
HSL	hsl(196, 63%, 43%)
HSV	hsv(196, 77%, 69%)
CMYK	cmyk(77.4%, 20.9%, 0%, 30.6%)
CIE-LAB	lab(54.43, -15.45, -27.49)
CIE-LCH	lch(54.43, 31.54, 240.66°)
OKLab	oklab(60.06% -0.07 -0.0772)
OKLCH	oklch(60.06% 0.104 227.8)
XYZ	xyz(18.1857, 22.3794, 44.9476)
Luminance	0.2238 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CB1 #B14D28

analogous

#28B191 #288CB1 #2848B1

triadic

#288CB1 #B1288C #8CB128

tetradic

#288CB1 #9128B1 #B14D28 #48B128

square

#288CB1 #9128B1 #B14D28 #48B128

split-complementary

#288CB1 #B12848 #B19128

monochromatic

#113D4D #1D657F #288CB1 #42ADD4 #74C2E0

Accessibility & contrast

On white

3.83

#288CB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.48

#288CB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB1

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CB1	#FFFFFF	#000000	##000000
##288CB1	1.00	3.83	5.48	5.48
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.48	21.00	1.00	1.00
##000000	5.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788AB3

Deuteranopia (green-blind)

#667CB1

Tritanopia (blue-blind)

#009798

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288cb1;
/* rgb */ color: rgb(40, 140, 177);
/* oklch */ color: oklch(60.1% 0.104 227.8);

Tailwind

colors: {
  custom: {
    50: '#77adc8',
    500: '#288cb1',
    950: '#000000',
  },
}

SCSS

$custom: #288cb1;
$custom-light: #77adc8;
$custom-dark: #000000;

JSON

{
  "hex": "#288cb1",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 177
  },
  "hsl": {
    "h": 196.204,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.60057,
    "c": 0.10424,
    "h": 227.8
  },
  "luminance": 0.22382
}

Semantic roles & 50–950 ramp

primary

#288CB1

secondary

#C7866E

accent

#6E42E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288CB1

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

Preview Lab → · Contrast checker → · Palette generator →