#428DA4#428DA4

#428DA4 is a mid, moderate cyan. Relative luminance 0.229; OKLCH L 60.5% C 0.082 H 220.8°. Best body text is #000000 at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#428DA4
RGB	rgb(66, 141, 164)
HSL	hsl(194, 43%, 45%)
HSV	hsv(194, 60%, 64%)
CMYK	cmyk(59.8%, 14%, 0%, 35.7%)
CIE-LAB	lab(54.96, -16.23, -19.16)
CIE-LCH	lch(54.96, 25.11, 229.73°)
OKLab	oklab(60.52% -0.0618 -0.0533)
OKLCH	oklch(60.52% 0.082 220.8)
XYZ	xyz(18.4698, 22.8865, 38.5589)
Luminance	0.2289 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DA4 #A45942

analogous

#42A48A #428DA4 #425CA4

triadic

#428DA4 #A4428D #8DA442

tetradic

#428DA4 #8A42A4 #A45942 #5CA442

square

#428DA4 #8A42A4 #A45942 #5CA442

split-complementary

#428DA4 #A4425C #A48A42

monochromatic

#1F424D #306778 #428DA4 #63AAC0 #8FC2D2

Accessibility & contrast

On white

3.77

#428DA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.58

#428DA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DA4

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DA4	#FFFFFF	#000000	##000000
##428DA4	1.00	3.77	5.58	5.58
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.58	21.00	1.00	1.00
##000000	5.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8AA5

Deuteranopia (green-blind)

#717FA4

Tritanopia (blue-blind)

#009594

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428da4;
/* rgb */ color: rgb(66, 141, 164);
/* oklch */ color: oklch(60.5% 0.082 220.8);

Tailwind

colors: {
  custom: {
    50: '#80aebf',
    500: '#428da4',
    950: '#000000',
  },
}

SCSS

$custom: #428da4;
$custom-light: #80aebf;
$custom-dark: #000000;

JSON

{
  "hex": "#428da4",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 164
  },
  "hsl": {
    "h": 194.082,
    "s": 42.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.60518,
    "c": 0.08157,
    "h": 220.8
  },
  "luminance": 0.22888
}

Semantic roles & 50–950 ramp

primary

#428DA4

secondary

#BD9285

accent

#7355D2

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428DA4

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

Preview Lab → · Contrast checker → · Palette generator →