#428BEE#428BEE

#428BEE is a light, vivid cyan. Relative luminance 0.258; OKLCH L 63.9% C 0.166 H 256.9°. Best body text is #000000 at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#428BEE
RGB	rgb(66, 139, 238)
HSL	hsl(215, 83%, 60%)
HSV	hsv(215, 72%, 93%)
CMYK	cmyk(72.3%, 41.6%, 0%, 6.7%)
CIE-LAB	lab(57.84, 10.02, -56.43)
CIE-LCH	lch(57.84, 57.32, 280.07°)
OKLab	oklab(63.93% -0.0376 -0.1613)
OKLCH	oklch(63.93% 0.166 256.9)
XYZ	xyz(26.9063, 25.7936, 84.4330)
Luminance	0.2580 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BEE #EEA542

analogous

#42E1EE #428BEE #4F42EE

triadic

#428BEE #EE428B #8BEE42

tetradic

#428BEE #EE42E1 #EEA542 #42EE4F

square

#428BEE #EE42E1 #EEA542 #42EE4F

split-complementary

#428BEE #EE4F42 #E1EE42

monochromatic

#0F4FA7 #146ADF #428BEE #7AADF3 #B2D0F8

Accessibility & contrast

On white

3.41

#428BEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.16

#428BEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BEE

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BEE	#FFFFFF	#000000	##000000
##428BEE	1.00	3.41	6.16	6.16
#FFFFFF	3.41	1.00	21.00	21.00
#000000	6.16	21.00	1.00	1.00
##000000	6.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B94F2

Deuteranopia (green-blind)

#3D84EC

Tritanopia (blue-blind)

#00A2B1

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428bee;
/* rgb */ color: rgb(66, 139, 238);
/* oklch */ color: oklch(63.9% 0.166 256.9);

Tailwind

colors: {
  custom: {
    50: '#8bacf4',
    500: '#428bee',
    950: '#000000',
  },
}

SCSS

$custom: #428bee;
$custom-light: #8bacf4;
$custom-dark: #000000;

JSON

{
  "hex": "#428bee",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 238
  },
  "hsl": {
    "h": 214.535,
    "s": 83.495,
    "l": 59.608
  },
  "oklch": {
    "l": 0.63926,
    "c": 0.16563,
    "h": 256.9
  },
  "luminance": 0.25797
}

Semantic roles & 50–950 ramp

primary

#428BEE

secondary

#E7CBA5

accent

#A32EFA

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0D1017

muted

#7E7F85

Preview Lab

Preview with #428BEE

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

Preview Lab → · Contrast checker → · Palette generator →