#4287DB#4287DB

#4287DB is a mid, vivid cyan. Relative luminance 0.236; OKLCH L 61.9% C 0.145 H 254.8°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#4287DB
RGB	rgb(66, 135, 219)
HSL	hsl(213, 68%, 56%)
HSV	hsv(213, 70%, 86%)
CMYK	cmyk(69.9%, 38.4%, 0%, 14.1%)
CIE-LAB	lab(55.68, 5.69, -49.28)
CIE-LCH	lch(55.68, 49.60, 276.59°)
OKLab	oklab(61.91% -0.0381 -0.1404)
OKLCH	oklch(61.91% 0.145 254.8)
XYZ	xyz(23.6922, 23.5981, 70.3104)
Luminance	0.2360 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4287DB #DB9642

analogous

#42D4DB #4287DB #4942DB

triadic

#4287DB #DB4287 #87DB42

tetradic

#4287DB #DB42D4 #DB9642 #42DB49

square

#4287DB #DB42D4 #DB9642 #42DB49

split-complementary

#4287DB #DB4942 #D4DB42

monochromatic

#1A4C89 #2468BC #4287DB #75A8E5 #A9C8EF

Accessibility & contrast

On white

3.67

#4287DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#4287DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4287DB

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4287DB	#FFFFFF	#000000	##000000
##4287DB	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#608DDE

Deuteranopia (green-blind)

#497FD9

Tritanopia (blue-blind)

#009BA6

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4287db;
/* rgb */ color: rgb(66, 135, 219);
/* oklch */ color: oklch(61.9% 0.145 254.8);

Tailwind

colors: {
  custom: {
    50: '#87a9e6',
    500: '#4287db',
    950: '#000000',
  },
}

SCSS

$custom: #4287db;
$custom-light: #87a9e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4287db",
  "rgb": {
    "r": 66,
    "g": 135,
    "b": 219
  },
  "hsl": {
    "h": 212.941,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.61911,
    "c": 0.14544,
    "h": 254.8
  },
  "luminance": 0.23601
}

Semantic roles & 50–950 ramp

primary

#4287DB

secondary

#DCC09D

accent

#9C3DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4287DB

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

Preview Lab → · Contrast checker → · Palette generator →