#428CD4#428CD4

#428CD4 is a light, vivid cyan. Relative luminance 0.247; OKLCH L 62.6% C 0.132 H 250.2°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#428CD4
RGB	rgb(66, 140, 212)
HSL	hsl(210, 63%, 55%)
HSV	hsv(210, 69%, 83%)
CMYK	cmyk(68.9%, 34%, 0%, 16.9%)
CIE-LAB	lab(56.75, 0.27, -43.66)
CIE-LCH	lch(56.75, 43.66, 270.35°)
OKLab	oklab(62.63% -0.0446 -0.1239)
OKLCH	oklch(62.63% 0.132 250.2)
XYZ	xyz(23.5041, 24.6654, 65.7968)
Luminance	0.2467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CD4 #D48A42

analogous

#42D4D3 #428CD4 #4243D4

triadic

#428CD4 #D4428C #8CD442

tetradic

#428CD4 #D342D4 #D48A42 #43D442

square

#428CD4 #D342D4 #D48A42 #43D442

split-complementary

#428CD4 #D44243 #D4D342

monochromatic

#1D4E7F #286DB1 #428CD4 #74AADF #A6C9EB

Accessibility & contrast

On white

3.54

#428CD4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#428CD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CD4

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CD4	#FFFFFF	#000000	##000000
##428CD4	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C90D7

Deuteranopia (green-blind)

#5782D3

Tritanopia (blue-blind)

#009DA6

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428cd4;
/* rgb */ color: rgb(66, 140, 212);
/* oklch */ color: oklch(62.6% 0.132 250.2);

Tailwind

colors: {
  custom: {
    50: '#86ade1',
    500: '#428cd4',
    950: '#000000',
  },
}

SCSS

$custom: #428cd4;
$custom-light: #86ade1;
$custom-dark: #000000;

JSON

{
  "hex": "#428cd4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 212
  },
  "hsl": {
    "h": 209.589,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.62626,
    "c": 0.13166,
    "h": 250.2
  },
  "luminance": 0.24668
}

Semantic roles & 50–950 ramp

primary

#428CD4

secondary

#D8B89A

accent

#9342E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428CD4

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

Preview Lab → · Contrast checker → · Palette generator →