#288CB4#288CB4

#288CB4 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.2% C 0.107 H 229.8°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX#288CB4
RGBrgb(40, 140, 180)
HSLhsl(197, 64%, 43%)
HSVhsv(197, 78%, 71%)
CMYKcmyk(77.8%, 22.2%, 0%, 29.4%)
CIE-LABlab(54.55, -14.41, -29.01)
CIE-LCHlch(54.55, 32.39, 243.59°)
OKLaboklab(60.2% -0.0689 -0.0816)
OKLCHoklch(60.2% 0.107 229.8)
XYZxyz(18.4880, 22.5003, 46.5398)
Luminance0.2250 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#288CB4 #B45028
analogous
#28B496 #288CB4 #2846B4
triadic
#288CB4 #B4288C #8CB428
tetradic
#288CB4 #9628B4 #B45028 #46B428
square
#288CB4 #9628B4 #B45028 #46B428
split-complementary
#288CB4 #B42846 #B49628
monochromatic
#123E50 #1D6582 #288CB4 #44ACD5 #76C2E1

Accessibility & contrast

On white

3.82
#288CB4 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.50
#288CB4 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB4
5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##288CB4#FFFFFF#000000##000000
##288CB41.003.825.505.50
#FFFFFF3.821.0021.0021.00
#0000005.5021.001.001.00
##0000005.5021.001.001.00

Color blindness preview

Protanopia (red-blind)
#778AB6
Deuteranopia (green-blind)
#657DB3
Tritanopia (blue-blind)
#009799
Achromatopsia (no color)
#828282

Design tokens & code

CSS
--color: #288cb4;
/* rgb */ color: rgb(40, 140, 180);
/* oklch */ color: oklch(60.2% 0.107 229.8);
Tailwind
colors: {
  custom: {
    50: '#78adca',
    500: '#288cb4',
    950: '#000000',
  },
}
SCSS
$custom: #288cb4;
$custom-light: #78adca;
$custom-dark: #000000;
JSON
{
  "hex": "#288cb4",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 180
  },
  "hsl": {
    "h": 197.143,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.602,
    "c": 0.1068,
    "h": 229.8
  },
  "luminance": 0.22503
}

Semantic roles & 50–950 ramp

primary
#288CB4
secondary
#C88970
accent
#7041E7
background
#F7FAFC
surface
#EEF4F8
border
#C9CED1
text
#0A1013
muted
#7C7F82

Preview Lab

Preview with #288CB4

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

Preview Lab → · Contrast checker → · Palette generator →

#288CB4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva