#428DE3#428DE3

#428DE3 is a light, vivid cyan. Relative luminance 0.258; OKLCH L 63.7% C 0.149 H 253.8°. Best body text is #000000 at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#428DE3
RGB	rgb(66, 141, 227)
HSL	hsl(212, 74%, 57%)
HSV	hsv(212, 71%, 89%)
CMYK	cmyk(70.9%, 37.9%, 0%, 11%)
CIE-LAB	lab(57.80, 4.93, -50.39)
CIE-LCH	lch(57.80, 50.63, 275.59°)
OKLab	oklab(63.7% -0.0418 -0.1435)
OKLCH	oklch(63.7% 0.149 253.8)
XYZ	xyz(25.6316, 25.7513, 76.2778)
Luminance	0.2575 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DE3 #E39842

analogous

#42DDE3 #428DE3 #4842E3

triadic

#428DE3 #E3428D #8DE342

tetradic

#428DE3 #E342DD #E39842 #42E348

square

#428DE3 #E342DD #E39842 #42E348

split-complementary

#428DE3 #E34842 #DDE342

monochromatic

#165195 #1E6ECA #428DE3 #77ADEB #ADCDF3

Accessibility & contrast

On white

3.41

#428DE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.15

#428DE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DE3

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DE3	#FFFFFF	#000000	##000000
##428DE3	1.00	3.41	6.15	6.15
#FFFFFF	3.41	1.00	21.00	21.00
#000000	6.15	21.00	1.00	1.00
##000000	6.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6593E6

Deuteranopia (green-blind)

#4D84E1

Tritanopia (blue-blind)

#00A1AD

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428de3;
/* rgb */ color: rgb(66, 141, 227);
/* oklch */ color: oklch(63.7% 0.149 253.8);

Tailwind

colors: {
  custom: {
    50: '#89adec',
    500: '#428de3',
    950: '#000000',
  },
}

SCSS

$custom: #428de3;
$custom-light: #89adec;
$custom-dark: #000000;

JSON

{
  "hex": "#428de3",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 227
  },
  "hsl": {
    "h": 212.05,
    "s": 74.194,
    "l": 57.451
  },
  "oklch": {
    "l": 0.637,
    "c": 0.14948,
    "h": 253.8
  },
  "luminance": 0.25754
}

Semantic roles & 50–950 ramp

primary

#428DE3

secondary

#E1C3A0

accent

#9A37F1

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428DE3

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

Preview Lab → · Contrast checker → · Palette generator →