#428CE3#428CE3

#428CE3 is a light, vivid cyan. Relative luminance 0.255; OKLCH L 63.5% C 0.151 H 254.3°. Best body text is #000000 at 6.09:1 contrast (WCAG AA passes).

Color values

HEX	#428CE3
RGB	rgb(66, 140, 227)
HSL	hsl(212, 74%, 57%)
HSV	hsv(212, 71%, 89%)
CMYK	cmyk(70.9%, 38.3%, 0%, 11%)
CIE-LAB	lab(57.52, 5.53, -50.83)
CIE-LCH	lch(57.52, 51.13, 276.20°)
OKLab	oklab(63.48% -0.0408 -0.1449)
OKLCH	oklch(63.48% 0.151 254.3)
XYZ	xyz(25.4849, 25.4577, 76.2289)
Luminance	0.2546 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE3 #E39942

analogous

#42DDE3 #428CE3 #4842E3

triadic

#428CE3 #E3428C #8CE342

tetradic

#428CE3 #E342DD #E39942 #42E348

square

#428CE3 #E342DD #E39942 #42E348

split-complementary

#428CE3 #E34842 #DDE342

monochromatic

#165095 #1E6DCA #428CE3 #77ACEB #ADCDF3

Accessibility & contrast

On white

3.45

#428CE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.09

#428CE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE3

6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE3	#FFFFFF	#000000	##000000
##428CE3	1.00	3.45	6.09	6.09
#FFFFFF	3.45	1.00	21.00	21.00
#000000	6.09	21.00	1.00	1.00
##000000	6.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6492E7

Deuteranopia (green-blind)

#4B83E1

Tritanopia (blue-blind)

#00A0AC

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ce3;
/* rgb */ color: rgb(66, 140, 227);
/* oklch */ color: oklch(63.5% 0.151 254.3);

Tailwind

colors: {
  custom: {
    50: '#89adec',
    500: '#428ce3',
    950: '#000000',
  },
}

SCSS

$custom: #428ce3;
$custom-light: #89adec;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce3",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 227
  },
  "hsl": {
    "h": 212.422,
    "s": 74.194,
    "l": 57.451
  },
  "oklch": {
    "l": 0.6348,
    "c": 0.15051,
    "h": 254.3
  },
  "luminance": 0.2546
}

Semantic roles & 50–950 ramp

primary

#428CE3

secondary

#E1C3A0

accent

#9B37F1

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE3

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

Preview Lab → · Contrast checker → · Palette generator →