#4288CB#4288CB

#4288CB is a mid, vivid cyan. Relative luminance 0.231; OKLCH L 61.2% C 0.124 H 249.7°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX#4288CB
RGBrgb(66, 136, 203)
HSLhsl(209, 57%, 53%)
HSVhsv(209, 67%, 80%)
CMYKcmyk(67.5%, 33%, 0%, 20.4%)
CIE-LABlab(55.15, -0.50, -41.11)
CIE-LCHlch(55.15, 41.11, 269.31°)
OKLaboklab(61.23% -0.0431 -0.1165)
OKLCHoklch(61.23% 0.124 249.7)
XYZxyz(21.8264, 23.0761, 59.7922)
Luminance0.2308 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4288CB #CB8542
analogous
#42CBC9 #4288CB #4244CB
triadic
#4288CB #CB4288 #88CB42
tetradic
#4288CB #C942CB #CB8542 #44CB42
square
#4288CB #C942CB #CB8542 #44CB42
split-complementary
#4288CB #CB4244 #CBC942
monochromatic
#204A73 #2D69A3 #4288CB #72A6D8 #A2C4E5

Accessibility & contrast

On white

3.74
#4288CB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.62
#4288CB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CB
5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4288CB#FFFFFF#000000##000000
##4288CB1.003.745.625.62
#FFFFFF3.741.0021.0021.00
#0000005.6221.001.001.00
##0000005.6221.001.001.00

Color blindness preview

Protanopia (red-blind)
#6A8BCE
Deuteranopia (green-blind)
#577ECA
Tritanopia (blue-blind)
#0098A0
Achromatopsia (no color)
#848484

Design tokens & code

CSS
--color: #4288cb;
/* rgb */ color: rgb(66, 136, 203);
/* oklch */ color: oklch(61.2% 0.124 249.7);
Tailwind
colors: {
  custom: {
    50: '#85aadb',
    500: '#4288cb',
    950: '#000000',
  },
}
SCSS
$custom: #4288cb;
$custom-light: #85aadb;
$custom-dark: #000000;
JSON
{
  "hex": "#4288cb",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 203
  },
  "hsl": {
    "h": 209.343,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.61227,
    "c": 0.12419,
    "h": 249.7
  },
  "luminance": 0.23078
}

Semantic roles & 50–950 ramp

primary
#4288CB
secondary
#D2B497
accent
#9248E0
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4288CB

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

Preview Lab → · Contrast checker → · Palette generator →

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