#4287CB#4287CB

#4287CB is a mid, vivid cyan. Relative luminance 0.228; OKLCH L 61.0% C 0.125 H 250.3°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#4287CB
RGB	rgb(66, 135, 203)
HSL	hsl(210, 57%, 53%)
HSV	hsv(210, 67%, 80%)
CMYK	cmyk(67.5%, 33.5%, 0%, 20.4%)
CIE-LAB	lab(54.86, 0.09, -41.56)
CIE-LCH	lch(54.86, 41.56, 270.13°)
OKLab	oklab(61% -0.0421 -0.1178)
OKLCH	oklch(61% 0.125 250.3)
XYZ	xyz(21.6862, 22.7957, 59.7455)
Luminance	0.2280 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287CB #CB8642

analogous

#42CBCA #4287CB #4243CB

triadic

#4287CB #CB4287 #87CB42

tetradic

#4287CB #CA42CB #CB8642 #43CB42

square

#4287CB #CA42CB #CB8642 #43CB42

split-complementary

#4287CB #CB4243 #CBCA42

monochromatic

#204A73 #2D68A3 #4287CB #72A5D8 #A2C4E5

Accessibility & contrast

On white

3.78

#4287CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#4287CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287CB

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287CB	#FFFFFF	#000000	##000000
##4287CB	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698ACE

Deuteranopia (green-blind)

#567DCA

Tritanopia (blue-blind)

#0097A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4287cb;
/* rgb */ color: rgb(66, 135, 203);
/* oklch */ color: oklch(61.0% 0.125 250.3);

Tailwind

colors: {
  custom: {
    50: '#85a9db',
    500: '#4287cb',
    950: '#000000',
  },
}

SCSS

$custom: #4287cb;
$custom-light: #85a9db;
$custom-dark: #000000;

JSON

{
  "hex": "#4287cb",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 203
  },
  "hsl": {
    "h": 209.781,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.61,
    "c": 0.12511,
    "h": 250.3
  },
  "luminance": 0.22798
}

Semantic roles & 50–950 ramp

primary

#4287CB

secondary

#D2B497

accent

#9348E0

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #4287CB

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

Preview Lab → · Contrast checker → · Palette generator →