#428DDA#428DDA

#428DDA is a light, vivid cyan. Relative luminance 0.253; OKLCH L 63.2% C 0.138 H 251.4°. Best body text is #000000 at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#428DDA
RGB	rgb(66, 141, 218)
HSL	hsl(210, 67%, 56%)
HSV	hsv(210, 70%, 85%)
CMYK	cmyk(69.7%, 35.3%, 0%, 14.5%)
CIE-LAB	lab(57.33, 1.77, -46.10)
CIE-LCH	lch(57.33, 46.13, 272.20°)
OKLab	oklab(63.18% -0.044 -0.131)
OKLCH	oklch(63.18% 0.138 251.4)
XYZ	xyz(24.4218, 25.2673, 69.9061)
Luminance	0.2527 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DDA #DA8F42

analogous

#42D9DA #428DDA #4342DA

triadic

#428DDA #DA428D #8DDA42

tetradic

#428DDA #DA42D9 #DA8F42 #42DA43

square

#428DDA #DA42D9 #DA8F42 #42DA43

split-complementary

#428DDA #DA4342 #D9DA42

monochromatic

#1A5087 #246EBA #428DDA #75ACE4 #A8CBEE

Accessibility & contrast

On white

3.47

#428DDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.05

#428DDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DDA

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DDA	#FFFFFF	#000000	##000000
##428DDA	1.00	3.47	6.05	6.05
#FFFFFF	3.47	1.00	21.00	21.00
#000000	6.05	21.00	1.00	1.00
##000000	6.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A91DD

Deuteranopia (green-blind)

#5483D8

Tritanopia (blue-blind)

#009FA9

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428dda;
/* rgb */ color: rgb(66, 141, 218);
/* oklch */ color: oklch(63.2% 0.138 251.4);

Tailwind

colors: {
  custom: {
    50: '#87ade6',
    500: '#428dda',
    950: '#000000',
  },
}

SCSS

$custom: #428dda;
$custom-light: #87ade6;
$custom-dark: #000000;

JSON

{
  "hex": "#428dda",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 218
  },
  "hsl": {
    "h": 210.395,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.63184,
    "c": 0.13816,
    "h": 251.4
  },
  "luminance": 0.2527
}

Semantic roles & 50–950 ramp

primary

#428DDA

secondary

#DBBC9C

accent

#953EEA

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428DDA

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

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