#288CB0#288CB0

#288CB0 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.0% C 0.103 H 227.1°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#288CB0
RGB	rgb(40, 140, 176)
HSL	hsl(196, 63%, 42%)
HSV	hsv(196, 77%, 69%)
CMYK	cmyk(77.3%, 20.5%, 0%, 31%)
CIE-LAB	lab(54.39, -15.80, -26.98)
CIE-LCH	lch(54.39, 31.27, 239.66°)
OKLab	oklab(60.01% -0.0704 -0.0757)
OKLCH	oklch(60.01% 0.103 227.1)
XYZ	xyz(18.0864, 22.3397, 44.4246)
Luminance	0.2234 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CB0 #B04C28

analogous

#28B090 #288CB0 #2848B0

triadic

#288CB0 #B0288C #8CB028

tetradic

#288CB0 #9028B0 #B04C28 #48B028

square

#288CB0 #9028B0 #B04C28 #48B028

split-complementary

#288CB0 #B02848 #B09028

monochromatic

#113D4C #1D647E #288CB0 #41ADD4 #73C3DF

Accessibility & contrast

On white

3.84

#288CB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#288CB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB0

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CB0	#FFFFFF	#000000	##000000
##288CB0	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7989B2

Deuteranopia (green-blind)

#677CB0

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288cb0;
/* rgb */ color: rgb(40, 140, 176);
/* oklch */ color: oklch(60.0% 0.103 227.1);

Tailwind

colors: {
  custom: {
    50: '#77adc7',
    500: '#288cb0',
    950: '#000000',
  },
}

SCSS

$custom: #288cb0;
$custom-light: #77adc7;
$custom-dark: #000000;

JSON

{
  "hex": "#288cb0",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 176
  },
  "hsl": {
    "h": 195.882,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.6001,
    "c": 0.10342,
    "h": 227.1
  },
  "luminance": 0.22342
}

Semantic roles & 50–950 ramp

primary

#288CB0

secondary

#C6856D

accent

#6D42E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288CB0

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

Preview Lab → · Contrast checker → · Palette generator →