#288DB5#288DB5

#288DB5 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.5% C 0.107 H 229.6°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#288DB5
RGB	rgb(40, 141, 181)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 71%)
CMYK	cmyk(77.9%, 22.1%, 0%, 29%)
CIE-LAB	lab(54.90, -14.61, -29.04)
CIE-LCH	lch(54.90, 32.51, 243.29°)
OKLab	oklab(60.49% -0.0695 -0.0817)
OKLCH	oklch(60.49% 0.107 229.6)
XYZ	xyz(18.7370, 22.8348, 47.1271)
Luminance	0.2284 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288DB5 #B55028

analogous

#28B596 #288DB5 #2847B5

triadic

#288DB5 #B5288D #8DB528

tetradic

#288DB5 #9628B5 #B55028 #47B528

square

#288DB5 #9628B5 #B55028 #47B528

split-complementary

#288DB5 #B52847 #B59628

monochromatic

#123F51 #1D6683 #288DB5 #44ADD6 #77C3E1

Accessibility & contrast

On white

3.77

#288DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#288DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288DB5

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288DB5	#FFFFFF	#000000	##000000
##288DB5	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788BB7

Deuteranopia (green-blind)

#667EB4

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #288db5;
/* rgb */ color: rgb(40, 141, 181);
/* oklch */ color: oklch(60.5% 0.107 229.6);

Tailwind

colors: {
  custom: {
    50: '#78aecb',
    500: '#288db5',
    950: '#000000',
  },
}

SCSS

$custom: #288db5;
$custom-light: #78aecb;
$custom-dark: #000000;

JSON

{
  "hex": "#288db5",
  "rgb": {
    "r": 40,
    "g": 141,
    "b": 181
  },
  "hsl": {
    "h": 197.021,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.60492,
    "c": 0.10726,
    "h": 229.6
  },
  "luminance": 0.22837
}

Semantic roles & 50–950 ramp

primary

#288DB5

secondary

#C88970

accent

#7041E7

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288DB5

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

Preview Lab → · Contrast checker → · Palette generator →