#4288D0#4288D0

#4288D0 is a mid, vivid cyan. Relative luminance 0.233; OKLCH L 61.5% C 0.130 H 251.3°. Best body text is #000000 at 5.66:1 contrast (WCAG AA passes).

Color values

HEX#4288D0
RGBrgb(66, 136, 208)
HSLhsl(210, 60%, 54%)
HSVhsv(210, 68%, 82%)
CMYKcmyk(68.3%, 34.6%, 0%, 18.4%)
CIE-LABlab(55.40, 1.24, -43.54)
CIE-LCHlch(55.40, 43.56, 271.63°)
OKLaboklab(61.5% -0.0418 -0.1236)
OKLCHoklch(61.5% 0.13 251.3)
XYZxyz(22.4319, 23.3183, 62.9810)
Luminance0.2332 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4288D0 #D08A42
analogous
#42CFD0 #4288D0 #4342D0
triadic
#4288D0 #D04288 #88D042
tetradic
#4288D0 #D042CF #D08A42 #42D043
square
#4288D0 #D042CF #D08A42 #42D043
split-complementary
#4288D0 #D04342 #CFD042
monochromatic
#1E4B79 #2A69AA #4288D0 #73A7DC #A4C6E8

Accessibility & contrast

On white

3.71
#4288D0 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.66
#4288D0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288D0
5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4288D0#FFFFFF#000000##000000
##4288D01.003.715.665.66
#FFFFFF3.711.0021.0021.00
#0000005.6621.001.001.00
##0000005.6621.001.001.00

Color blindness preview

Protanopia (red-blind)
#688CD3
Deuteranopia (green-blind)
#547FCF
Tritanopia (blue-blind)
#0099A2
Achromatopsia (no color)
#858585

Design tokens & code

CSS
--color: #4288d0;
/* rgb */ color: rgb(66, 136, 208);
/* oklch */ color: oklch(61.5% 0.130 251.3);
Tailwind
colors: {
  custom: {
    50: '#86aadf',
    500: '#4288d0',
    950: '#000000',
  },
}
SCSS
$custom: #4288d0;
$custom-light: #86aadf;
$custom-dark: #000000;
JSON
{
  "hex": "#4288d0",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 208
  },
  "hsl": {
    "h": 210.423,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.61502,
    "c": 0.13043,
    "h": 251.3
  },
  "luminance": 0.23321
}

Semantic roles & 50–950 ramp

primary
#4288D0
secondary
#D5B799
accent
#9544E3
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4288D0

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

Preview Lab → · Contrast checker → · Palette generator →

#4288D0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva