#428DD4#428DD4

#428DD4 is a light, vivid cyan. Relative luminance 0.250; OKLCH L 62.9% C 0.131 H 249.6°. Best body text is #000000 at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#428DD4
RGB	rgb(66, 141, 212)
HSL	hsl(209, 63%, 55%)
HSV	hsv(209, 69%, 83%)
CMYK	cmyk(68.9%, 33.5%, 0%, 16.9%)
CIE-LAB	lab(57.04, -0.32, -43.21)
CIE-LCH	lch(57.04, 43.21, 269.58°)
OKLab	oklab(62.85% -0.0456 -0.1225)
OKLCH	oklch(62.85% 0.131 249.6)
XYZ	xyz(23.6509, 24.9589, 65.8457)
Luminance	0.2496 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DD4 #D48942

analogous

#42D4D2 #428DD4 #4244D4

triadic

#428DD4 #D4428D #8DD442

tetradic

#428DD4 #D242D4 #D48942 #44D442

square

#428DD4 #D242D4 #D48942 #44D442

split-complementary

#428DD4 #D44244 #D4D242

monochromatic

#1D4F7F #286EB1 #428DD4 #74ABDF #A6C9EB

Accessibility & contrast

On white

3.50

#428DD4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.99

#428DD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DD4

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DD4	#FFFFFF	#000000	##000000
##428DD4	1.00	3.50	5.99	5.99
#FFFFFF	3.50	1.00	21.00	21.00
#000000	5.99	21.00	1.00	1.00
##000000	5.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D90D7

Deuteranopia (green-blind)

#5983D3

Tritanopia (blue-blind)

#009EA7

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428dd4;
/* rgb */ color: rgb(66, 141, 212);
/* oklch */ color: oklch(62.9% 0.131 249.6);

Tailwind

colors: {
  custom: {
    50: '#86aee1',
    500: '#428dd4',
    950: '#000000',
  },
}

SCSS

$custom: #428dd4;
$custom-light: #86aee1;
$custom-dark: #000000;

JSON

{
  "hex": "#428dd4",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 212
  },
  "hsl": {
    "h": 209.178,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.62851,
    "c": 0.13073,
    "h": 249.6
  },
  "luminance": 0.24961
}

Semantic roles & 50–950 ramp

primary

#428DD4

secondary

#D8B89A

accent

#9242E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428DD4

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

Preview Lab → · Contrast checker → · Palette generator →