#4290D3#4290D3

#4290D3 is a light, vivid cyan. Relative luminance 0.258; OKLCH L 63.5% C 0.127 H 247.4°. Best body text is #000000 at 6.16:1 contrast (WCAG AA passes).

Color values

HEX#4290D3
RGBrgb(66, 144, 211)
HSLhsl(208, 62%, 54%)
HSVhsv(208, 69%, 83%)
CMYKcmyk(68.7%, 31.8%, 0%, 17.3%)
CIE-LABlab(57.85, -2.41, -41.36)
CIE-LCHlch(57.85, 41.43, 266.66°)
OKLaboklab(63.48% -0.0488 -0.1171)
OKLCHoklch(63.48% 0.127 247.4)
XYZxyz(23.9735, 25.8054, 65.3329)
Luminance0.2581 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4290D3 #D38542
analogous
#42D3CE #4290D3 #4248D3
triadic
#4290D3 #D34290 #90D342
tetradic
#4290D3 #CE42D3 #D38542 #48D342
square
#4290D3 #CE42D3 #D38542 #48D342
split-complementary
#4290D3 #D34248 #D3CE42
monochromatic
#1D517D #2971AF #4290D3 #74ADDF #A5CAEA

Accessibility & contrast

On white

3.41
#4290D3 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.16
#4290D3 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290D3
6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4290D3#FFFFFF#000000##000000
##4290D31.003.416.166.16
#FFFFFF3.411.0021.0021.00
#0000006.1621.001.001.00
##0000006.1621.001.001.00

Color blindness preview

Protanopia (red-blind)
#7293D6
Deuteranopia (green-blind)
#5E85D2
Tritanopia (blue-blind)
#00A0A8
Achromatopsia (no color)
#8B8B8B

Design tokens & code

CSS
--color: #4290d3;
/* rgb */ color: rgb(66, 144, 211);
/* oklch */ color: oklch(63.5% 0.127 247.4);
Tailwind
colors: {
  custom: {
    50: '#86b0e1',
    500: '#4290d3',
    950: '#000000',
  },
}
SCSS
$custom: #4290d3;
$custom-light: #86b0e1;
$custom-dark: #000000;
JSON
{
  "hex": "#4290d3",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 211
  },
  "hsl": {
    "h": 207.724,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.63477,
    "c": 0.12687,
    "h": 247.4
  },
  "luminance": 0.25808
}

Semantic roles & 50–950 ramp

primary
#4290D3
secondary
#D7B69A
accent
#8E42E5
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4290D3

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

Preview Lab → · Contrast checker → · Palette generator →

#4290D3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva