#288BB3#288BB3

#288BB3 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.9% C 0.106 H 230.0°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#288BB3
RGB	rgb(40, 139, 179)
HSL	hsl(197, 63%, 43%)
HSV	hsv(197, 78%, 70%)
CMYK	cmyk(77.7%, 22.3%, 0%, 29.8%)
CIE-LAB	lab(54.21, -14.20, -28.98)
CIE-LCH	lch(54.21, 32.27, 243.89°)
OKLab	oklab(59.91% -0.0683 -0.0815)
OKLCH	oklch(59.91% 0.106 230)
XYZ	xyz(18.2411, 22.1688, 45.9567)
Luminance	0.2217 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288BB3 #B35028

analogous

#28B395 #288BB3 #2846B3

triadic

#288BB3 #B3288B #8BB328

tetradic

#288BB3 #9528B3 #B35028 #46B328

square

#288BB3 #9528B3 #B35028 #46B328

split-complementary

#288BB3 #B32846 #B39528

monochromatic

#123D4F #1D6481 #288BB3 #43ABD5 #75C1E0

Accessibility & contrast

On white

3.86

#288BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#288BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288BB3

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288BB3	#FFFFFF	#000000	##000000
##288BB3	1.00	3.86	5.43	5.43
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B5

Deuteranopia (green-blind)

#647CB2

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288bb3;
/* rgb */ color: rgb(40, 139, 179);
/* oklch */ color: oklch(59.9% 0.106 230.0);

Tailwind

colors: {
  custom: {
    50: '#78adca',
    500: '#288bb3',
    950: '#000000',
  },
}

SCSS

$custom: #288bb3;
$custom-light: #78adca;
$custom-dark: #000000;

JSON

{
  "hex": "#288bb3",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 179
  },
  "hsl": {
    "h": 197.266,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.59908,
    "c": 0.10635,
    "h": 230
  },
  "luminance": 0.22171
}

Semantic roles & 50–950 ramp

primary

#288BB3

secondary

#C8896F

accent

#7141E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288BB3

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

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