#428EDC#428EDC

#428EDC is a light, vivid cyan. Relative luminance 0.257; OKLCH L 63.5% C 0.140 H 251.5°. Best body text is #000000 at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#428EDC
RGB	rgb(66, 142, 220)
HSL	hsl(210, 69%, 56%)
HSV	hsv(210, 70%, 86%)
CMYK	cmyk(70%, 35.5%, 0%, 13.7%)
CIE-LAB	lab(57.72, 1.88, -46.60)
CIE-LCH	lch(57.72, 46.64, 272.31°)
OKLab	oklab(63.52% -0.0444 -0.1324)
OKLCH	oklch(63.52% 0.14 251.5)
XYZ	xyz(24.8332, 25.6689, 71.3421)
Luminance	0.2567 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EDC #DC9042

analogous

#42DBDC #428EDC #4342DC

triadic

#428EDC #DC428E #8EDC42

tetradic

#428EDC #DC42DB #DC9042 #42DC43

square

#428EDC #DC42DB #DC9042 #42DC43

split-complementary

#428EDC #DC4342 #DBDC42

monochromatic

#1A518A #236FBE #428EDC #76ADE6 #A9CCEF

Accessibility & contrast

On white

3.42

#428EDC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.13

#428EDC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EDC

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EDC	#FFFFFF	#000000	##000000
##428EDC	1.00	3.42	6.13	6.13
#FFFFFF	3.42	1.00	21.00	21.00
#000000	6.13	21.00	1.00	1.00
##000000	6.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B93DF

Deuteranopia (green-blind)

#5484DA

Tritanopia (blue-blind)

#00A0AB

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #428edc;
/* rgb */ color: rgb(66, 142, 220);
/* oklch */ color: oklch(63.5% 0.140 251.5);

Tailwind

colors: {
  custom: {
    50: '#88aee7',
    500: '#428edc',
    950: '#000000',
  },
}

SCSS

$custom: #428edc;
$custom-light: #88aee7;
$custom-dark: #000000;

JSON

{
  "hex": "#428edc",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 220
  },
  "hsl": {
    "h": 210.39,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.6352,
    "c": 0.13969,
    "h": 251.5
  },
  "luminance": 0.25672
}

Semantic roles & 50–950 ramp

primary

#428EDC

secondary

#DDBD9D

accent

#953CEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428EDC

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

Preview Lab → · Contrast checker → · Palette generator →