#4288DD#4288DD

#4288DD is a light, vivid cyan. Relative luminance 0.240; OKLCH L 62.2% C 0.147 H 254.8°. Best body text is #000000 at 5.80:1 contrast (WCAG AA passes).

Color values

HEX#4288DD
RGBrgb(66, 136, 221)
HSLhsl(213, 70%, 56%)
HSVhsv(213, 70%, 87%)
CMYKcmyk(70.1%, 38.5%, 0%, 13.3%)
CIE-LABlab(56.07, 5.80, -49.78)
CIE-LCHlch(56.07, 50.12, 276.65°)
OKLaboklab(62.25% -0.0385 -0.1418)
OKLCHoklch(62.25% 0.147 254.8)
XYZxyz(24.0973, 23.9844, 71.7521)
Luminance0.2399 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4288DD #DD9742
analogous
#42D6DD #4288DD #4A42DD
triadic
#4288DD #DD4288 #88DD42
tetradic
#4288DD #DD42D6 #DD9742 #42DD4A
square
#4288DD #DD42D6 #DD9742 #42DD4A
split-complementary
#4288DD #DD4A42 #D6DD42
monochromatic
#194D8C #2269BF #4288DD #76A9E6 #AAC9F0

Accessibility & contrast

On white

3.62
#4288DD on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.80
#4288DD on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288DD
5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4288DD#FFFFFF#000000##000000
##4288DD1.003.625.805.80
#FFFFFF3.621.0021.0021.00
#0000005.8021.001.001.00
##0000005.8021.001.001.00

Color blindness preview

Protanopia (red-blind)
#618EE0
Deuteranopia (green-blind)
#4980DB
Tritanopia (blue-blind)
#009CA8
Achromatopsia (no color)
#868686

Design tokens & code

CSS
--color: #4288dd;
/* rgb */ color: rgb(66, 136, 221);
/* oklch */ color: oklch(62.2% 0.147 254.8);
Tailwind
colors: {
  custom: {
    50: '#88aae8',
    500: '#4288dd',
    950: '#000000',
  },
}
SCSS
$custom: #4288dd;
$custom-light: #88aae8;
$custom-dark: #000000;
JSON
{
  "hex": "#4288dd",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 221
  },
  "hsl": {
    "h": 212.903,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.62249,
    "c": 0.14698,
    "h": 254.8
  },
  "luminance": 0.23987
}

Semantic roles & 50–950 ramp

primary
#4288DD
secondary
#DDC09D
accent
#9C3BEC
background
#F9FAFE
surface
#F1F4FC
border
#CBCED5
text
#0D0F16
muted
#7E7F84

Preview Lab

Preview with #4288DD

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

Preview Lab → · Contrast checker → · Palette generator →

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