#4287DD#4287DD

#4287DD is a light, vivid cyan. Relative luminance 0.237; OKLCH L 62.0% C 0.148 H 255.3°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#4287DD
RGB	rgb(66, 135, 221)
HSL	hsl(213, 70%, 56%)
HSV	hsv(213, 70%, 87%)
CMYK	cmyk(70.1%, 38.9%, 0%, 13.3%)
CIE-LAB	lab(55.79, 6.40, -50.23)
CIE-LCH	lch(55.79, 50.63, 277.26°)
OKLab	oklab(62.03% -0.0376 -0.1432)
OKLCH	oklch(62.03% 0.148 255.3)
XYZ	xyz(23.9571, 23.7041, 71.7054)
Luminance	0.2371 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287DD #DD9842

analogous

#42D5DD #4287DD #4B42DD

triadic

#4287DD #DD4287 #87DD42

tetradic

#4287DD #DD42D5 #DD9842 #42DD4B

square

#4287DD #DD42D5 #DD9842 #42DD4B

split-complementary

#4287DD #DD4B42 #D5DD42

monochromatic

#194C8C #2268BF #4287DD #76A8E6 #AAC9F0

Accessibility & contrast

On white

3.66

#4287DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#4287DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287DD

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287DD	#FFFFFF	#000000	##000000
##4287DD	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F8EE0

Deuteranopia (green-blind)

#477FDB

Tritanopia (blue-blind)

#009BA7

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4287dd;
/* rgb */ color: rgb(66, 135, 221);
/* oklch */ color: oklch(62.0% 0.148 255.3);

Tailwind

colors: {
  custom: {
    50: '#88a9e8',
    500: '#4287dd',
    950: '#000000',
  },
}

SCSS

$custom: #4287dd;
$custom-light: #88a9e8;
$custom-dark: #000000;

JSON

{
  "hex": "#4287dd",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 221
  },
  "hsl": {
    "h": 213.29,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.62029,
    "c": 0.14802,
    "h": 255.3
  },
  "luminance": 0.23707
}

Semantic roles & 50–950 ramp

primary

#4287DD

secondary

#DDC19D

accent

#9E3BEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4287DD

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

Preview Lab → · Contrast checker → · Palette generator →