#4290CF#4290CF

#4290CF is a light, vivid cyan. Relative luminance 0.256; OKLCH L 63.3% C 0.122 H 245.8°. Best body text is #000000 at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#4290CF
RGB	rgb(66, 144, 207)
HSL	hsl(207, 59%, 54%)
HSV	hsv(207, 68%, 81%)
CMYK	cmyk(68.1%, 30.4%, 0%, 18.8%)
CIE-LAB	lab(57.66, -3.79, -39.41)
CIE-LCH	lch(57.66, 39.59, 264.51°)
OKLab	oklab(63.27% -0.05 -0.1114)
OKLCH	oklch(63.27% 0.122 245.8)
XYZ	xyz(23.4783, 25.6073, 62.7247)
Luminance	0.2561 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290CF #CF8142

analogous

#42CFC8 #4290CF #4249CF

triadic

#4290CF #CF4290 #90CF42

tetradic

#4290CF #C842CF #CF8142 #49CF42

square

#4290CF #C842CF #CF8142 #49CF42

split-complementary

#4290CF #CF4249 #CFC842

monochromatic

#1F5078 #2B71A9 #4290CF #73ADDB #A4C9E8

Accessibility & contrast

On white

3.43

#4290CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.12

#4290CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290CF

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290CF	#FFFFFF	#000000	##000000
##4290CF	1.00	3.43	6.12	6.12
#FFFFFF	3.43	1.00	21.00	21.00
#000000	6.12	21.00	1.00	1.00
##000000	6.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7492D2

Deuteranopia (green-blind)

#6084CE

Tritanopia (blue-blind)

#009FA6

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #4290cf;
/* rgb */ color: rgb(66, 144, 207);
/* oklch */ color: oklch(63.3% 0.122 245.8);

Tailwind

colors: {
  custom: {
    50: '#86b0de',
    500: '#4290cf',
    950: '#000000',
  },
}

SCSS

$custom: #4290cf;
$custom-light: #86b0de;
$custom-dark: #000000;

JSON

{
  "hex": "#4290cf",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 207
  },
  "hsl": {
    "h": 206.809,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.63266,
    "c": 0.12212,
    "h": 245.8
  },
  "luminance": 0.2561
}

Semantic roles & 50–950 ramp

primary

#4290CF

secondary

#D5B398

accent

#8C45E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4290CF

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

Preview Lab → · Contrast checker → · Palette generator →