#428EA5#428EA5

#428EA5 is a mid, moderate cyan. Relative luminance 0.232; OKLCH L 60.8% C 0.082 H 220.5°. Best body text is #000000 at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#428EA5
RGB	rgb(66, 142, 165)
HSL	hsl(194, 43%, 45%)
HSV	hsv(194, 60%, 65%)
CMYK	cmyk(60%, 13.9%, 0%, 35.3%)
CIE-LAB	lab(55.30, -16.46, -19.21)
CIE-LCH	lch(55.30, 25.30, 229.41°)
OKLab	oklab(60.8% -0.0625 -0.0534)
OKLCH	oklch(60.8% 0.082 220.5)
XYZ	xyz(18.7086, 23.2190, 39.0858)
Luminance	0.2322 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EA5 #A55942

analogous

#42A58A #428EA5 #425DA5

triadic

#428EA5 #A5428E #8EA542

tetradic

#428EA5 #8A42A5 #A55942 #5DA542

square

#428EA5 #8A42A5 #A55942 #5DA542

split-complementary

#428EA5 #A5425D #A58A42

monochromatic

#1F434E #316879 #428EA5 #63ABC1 #8FC3D2

Accessibility & contrast

On white

3.72

#428EA5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.64

#428EA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EA5

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EA5	#FFFFFF	#000000	##000000
##428EA5	1.00	3.72	5.64	5.64
#FFFFFF	3.72	1.00	21.00	21.00
#000000	5.64	21.00	1.00	1.00
##000000	5.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#808BA6

Deuteranopia (green-blind)

#7280A5

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428ea5;
/* rgb */ color: rgb(66, 142, 165);
/* oklch */ color: oklch(60.8% 0.082 220.5);

Tailwind

colors: {
  custom: {
    50: '#80afbf',
    500: '#428ea5',
    950: '#000000',
  },
}

SCSS

$custom: #428ea5;
$custom-light: #80afbf;
$custom-dark: #000000;

JSON

{
  "hex": "#428ea5",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 165
  },
  "hsl": {
    "h": 193.939,
    "s": 42.857,
    "l": 45.294
  },
  "oklch": {
    "l": 0.60804,
    "c": 0.08221,
    "h": 220.5
  },
  "luminance": 0.23221
}

Semantic roles & 50–950 ramp

primary

#428EA5

secondary

#BD9285

accent

#7255D3

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428EA5

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

Preview Lab → · Contrast checker → · Palette generator →