#428EDA#428EDA

#428EDA is a light, vivid cyan. Relative luminance 0.256; OKLCH L 63.4% C 0.137 H 250.9°. Best body text is #000000 at 6.11:1 contrast (WCAG AA passes).

Color values

HEX	#428EDA
RGB	rgb(66, 142, 218)
HSL	hsl(210, 67%, 56%)
HSV	hsv(210, 70%, 85%)
CMYK	cmyk(69.7%, 34.9%, 0%, 14.5%)
CIE-LAB	lab(57.62, 1.18, -45.65)
CIE-LCH	lch(57.62, 45.66, 271.48°)
OKLab	oklab(63.41% -0.0449 -0.1296)
OKLCH	oklch(63.41% 0.137 250.9)
XYZ	xyz(24.5699, 25.5636, 69.9554)
Luminance	0.2557 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EDA #DA8E42

analogous

#42DADA #428EDA #4242DA

triadic

#428EDA #DA428E #8EDA42

tetradic

#428EDA #DA42DA #DA8E42 #42DA42

square

#428EDA #DA42DA #DA8E42 #42DA42

split-complementary

#428EDA #DA4242 #DADA42

monochromatic

#1A5187 #246FBA #428EDA #75ADE4 #A8CBEE

Accessibility & contrast

On white

3.44

#428EDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.11

#428EDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EDA

6.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EDA	#FFFFFF	#000000	##000000
##428EDA	1.00	3.44	6.11	6.11
#FFFFFF	3.44	1.00	21.00	21.00
#000000	6.11	21.00	1.00	1.00
##000000	6.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C92DD

Deuteranopia (green-blind)

#5684D8

Tritanopia (blue-blind)

#00A0AA

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428eda;
/* rgb */ color: rgb(66, 142, 218);
/* oklch */ color: oklch(63.4% 0.137 250.9);

Tailwind

colors: {
  custom: {
    50: '#87aee6',
    500: '#428eda',
    950: '#000000',
  },
}

SCSS

$custom: #428eda;
$custom-light: #87aee6;
$custom-dark: #000000;

JSON

{
  "hex": "#428eda",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 218
  },
  "hsl": {
    "h": 210,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.63408,
    "c": 0.13721,
    "h": 250.9
  },
  "luminance": 0.25566
}

Semantic roles & 50–950 ramp

primary

#428EDA

secondary

#DBBC9C

accent

#943EEA

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428EDA

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

Preview Lab → · Contrast checker → · Palette generator →