#288CB3#288CB3

#288CB3 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.2% C 0.106 H 229.1°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#288CB3
RGB	rgb(40, 140, 179)
HSL	hsl(197, 63%, 43%)
HSV	hsv(197, 78%, 70%)
CMYK	cmyk(77.7%, 21.8%, 0%, 29.8%)
CIE-LAB	lab(54.51, -14.76, -28.50)
CIE-LCH	lch(54.51, 32.10, 242.63°)
OKLab	oklab(60.15% -0.0693 -0.0801)
OKLCH	oklch(60.15% 0.106 229.1)
XYZ	xyz(18.3865, 22.4597, 46.0052)
Luminance	0.2246 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CB3 #B34F28

analogous

#28B395 #288CB3 #2846B3

triadic

#288CB3 #B3288C #8CB328

tetradic

#288CB3 #9528B3 #B34F28 #46B328

square

#288CB3 #9528B3 #B34F28 #46B328

split-complementary

#288CB3 #B32846 #B39528

monochromatic

#123E4F #1D6581 #288CB3 #43ACD5 #75C2E0

Accessibility & contrast

On white

3.82

#288CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#288CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB3

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CB3	#FFFFFF	#000000	##000000
##288CB3	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788AB5

Deuteranopia (green-blind)

#657DB2

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288cb3;
/* rgb */ color: rgb(40, 140, 179);
/* oklch */ color: oklch(60.2% 0.106 229.1);

Tailwind

colors: {
  custom: {
    50: '#78adca',
    500: '#288cb3',
    950: '#000000',
  },
}

SCSS

$custom: #288cb3;
$custom-light: #78adca;
$custom-dark: #000000;

JSON

{
  "hex": "#288cb3",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 179
  },
  "hsl": {
    "h": 196.835,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.60152,
    "c": 0.10593,
    "h": 229.1
  },
  "luminance": 0.22462
}

Semantic roles & 50–950 ramp

primary

#288CB3

secondary

#C8886F

accent

#7041E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288CB3

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

Preview Lab → · Contrast checker → · Palette generator →