#4288CF#4288CF

#4288CF is a mid, vivid cyan. Relative luminance 0.233; OKLCH L 61.4% C 0.129 H 251.0°. Best body text is #000000 at 5.65:1 contrast (WCAG AA passes).

Color values

HEX#4288CF
RGBrgb(66, 136, 207)
HSLhsl(210, 59%, 54%)
HSVhsv(210, 68%, 81%)
CMYKcmyk(68.1%, 34.3%, 0%, 18.8%)
CIE-LABlab(55.35, 0.89, -43.05)
CIE-LCHlch(55.35, 43.06, 271.18°)
OKLaboklab(61.45% -0.042 -0.1221)
OKLCHoklch(61.45% 0.129 251)
XYZxyz(22.3092, 23.2692, 62.3351)
Luminance0.2327 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4288CF #CF8942
analogous
#42CECF #4288CF #4242CF
triadic
#4288CF #CF4288 #88CF42
tetradic
#4288CF #CF42CE #CF8942 #42CF42
square
#4288CF #CF42CE #CF8942 #42CF42
split-complementary
#4288CF #CF4242 #CECF42
monochromatic
#1F4B78 #2B69A9 #4288CF #73A7DB #A4C5E8

Accessibility & contrast

On white

3.71
#4288CF on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.65
#4288CF on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CF
5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4288CF#FFFFFF#000000##000000
##4288CF1.003.715.655.65
#FFFFFF3.711.0021.0021.00
#0000005.6521.001.001.00
##0000005.6521.001.001.00

Color blindness preview

Protanopia (red-blind)
#688CD2
Deuteranopia (green-blind)
#547ECE
Tritanopia (blue-blind)
#0099A2
Achromatopsia (no color)
#858585

Design tokens & code

CSS
--color: #4288cf;
/* rgb */ color: rgb(66, 136, 207);
/* oklch */ color: oklch(61.4% 0.129 251.0);
Tailwind
colors: {
  custom: {
    50: '#85aade',
    500: '#4288cf',
    950: '#000000',
  },
}
SCSS
$custom: #4288cf;
$custom-light: #85aade;
$custom-dark: #000000;
JSON
{
  "hex": "#4288cf",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 207
  },
  "hsl": {
    "h": 210.213,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.61447,
    "c": 0.12919,
    "h": 251
  },
  "luminance": 0.23272
}

Semantic roles & 50–950 ramp

primary
#4288CF
secondary
#D5B798
accent
#9445E3
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4288CF

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

Preview Lab → · Contrast checker → · Palette generator →

#4288CF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva