#428BC4#428BC4

#428BC4 is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.5% C 0.113 H 244.8°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#428BC4
RGB	rgb(66, 139, 196)
HSL	hsl(206, 52%, 51%)
HSV	hsv(206, 66%, 77%)
CMYK	cmyk(66.3%, 29.1%, 0%, 23.1%)
CIE-LAB	lab(55.69, -4.65, -36.29)
CIE-LCH	lch(55.69, 36.59, 262.70°)
OKLab	oklab(61.54% -0.0482 -0.1024)
OKLCH	oklch(61.54% 0.113 244.8)
XYZ	xyz(21.4394, 23.6068, 55.6405)
Luminance	0.2361 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC4 #C47B42

analogous

#42C4BC #428BC4 #424AC4

triadic

#428BC4 #C4428B #8BC442

tetradic

#428BC4 #BC42C4 #C47B42 #4AC442

square

#428BC4 #BC42C4 #C47B42 #4AC442

split-complementary

#428BC4 #C4424A #C4BC42

monochromatic

#214A6A #306B99 #428BC4 #71A8D3 #9FC4E1

Accessibility & contrast

On white

3.67

#428BC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#428BC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC4

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC4	#FFFFFF	#000000	##000000
##428BC4	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#728CC7

Deuteranopia (green-blind)

#6080C3

Tritanopia (blue-blind)

#00999F

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bc4;
/* rgb */ color: rgb(66, 139, 196);
/* oklch */ color: oklch(61.5% 0.113 244.8);

Tailwind

colors: {
  custom: {
    50: '#84acd6',
    500: '#428bc4',
    950: '#000000',
  },
}

SCSS

$custom: #428bc4;
$custom-light: #84acd6;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc4",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 196
  },
  "hsl": {
    "h": 206.308,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.61544,
    "c": 0.11322,
    "h": 244.8
  },
  "luminance": 0.23609
}

Semantic roles & 50–950 ramp

primary

#428BC4

secondary

#CEAD94

accent

#8B4CDC

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC4

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

Preview Lab → · Contrast checker → · Palette generator →