#4287CC#4287CC

#4287CC is a mid, vivid cyan. Relative luminance 0.228; OKLCH L 61.1% C 0.126 H 250.7°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#4287CC
RGB	rgb(66, 135, 204)
HSL	hsl(210, 58%, 53%)
HSV	hsv(210, 68%, 80%)
CMYK	cmyk(67.6%, 33.8%, 0%, 20%)
CIE-LAB	lab(54.91, 0.44, -42.05)
CIE-LCH	lch(54.91, 42.05, 270.60°)
OKLab	oklab(61.06% -0.0419 -0.1192)
OKLCH	oklch(61.06% 0.126 250.7)
XYZ	xyz(21.8058, 22.8436, 60.3751)
Luminance	0.2285 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287CC #CC8742

analogous

#42CCCC #4287CC #4242CC

triadic

#4287CC #CC4287 #87CC42

tetradic

#4287CC #CC42CC #CC8742 #42CC42

square

#4287CC #CC42CC #CC8742 #42CC42

split-complementary

#4287CC #CC4242 #CCCC42

monochromatic

#1F4A74 #2C68A4 #4287CC #72A6D9 #A2C4E6

Accessibility & contrast

On white

3.77

#4287CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#4287CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287CC

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287CC	#FFFFFF	#000000	##000000
##4287CC	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688BCF

Deuteranopia (green-blind)

#557DCB

Tritanopia (blue-blind)

#0097A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4287cc;
/* rgb */ color: rgb(66, 135, 204);
/* oklch */ color: oklch(61.1% 0.126 250.7);

Tailwind

colors: {
  custom: {
    50: '#85a9dc',
    500: '#4287cc',
    950: '#000000',
  },
}

SCSS

$custom: #4287cc;
$custom-light: #85a9dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4287cc",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 204
  },
  "hsl": {
    "h": 210,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.61055,
    "c": 0.12637,
    "h": 250.7
  },
  "luminance": 0.22846
}

Semantic roles & 50–950 ramp

primary

#4287CC

secondary

#D3B597

accent

#9447E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #4287CC

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

Preview Lab → · Contrast checker → · Palette generator →