#428EA1#428EA1

#428EA1 is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.6% C 0.080 H 216.6°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#428EA1
RGB	rgb(66, 142, 161)
HSL	hsl(192, 42%, 45%)
HSV	hsv(192, 59%, 63%)
CMYK	cmyk(59%, 11.8%, 0%, 36.9%)
CIE-LAB	lab(55.15, -17.70, -17.14)
CIE-LCH	lch(55.15, 24.64, 224.08°)
OKLab	oklab(60.64% -0.0641 -0.0476)
OKLCH	oklch(60.64% 0.08 216.6)
XYZ	xyz(18.3502, 23.0757, 37.1983)
Luminance	0.2308 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EA1 #A15542

analogous

#42A185 #428EA1 #425FA1

triadic

#428EA1 #A1428E #8EA142

tetradic

#428EA1 #8542A1 #A15542 #5FA142

square

#428EA1 #8542A1 #A15542 #5FA142

split-complementary

#428EA1 #A1425F #A18542

monochromatic

#1E414A #306876 #428EA1 #62ACBF #8DC3D0

Accessibility & contrast

On white

3.74

#428EA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.62

#428EA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EA1

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EA1	#FFFFFF	#000000	##000000
##428EA1	1.00	3.74	5.62	5.62
#FFFFFF	3.74	1.00	21.00	21.00
#000000	5.62	21.00	1.00	1.00
##000000	5.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#818AA2

Deuteranopia (green-blind)

#7380A1

Tritanopia (blue-blind)

#009594

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428ea1;
/* rgb */ color: rgb(66, 142, 161);
/* oklch */ color: oklch(60.6% 0.080 216.6);

Tailwind

colors: {
  custom: {
    50: '#7fafbc',
    500: '#428ea1',
    950: '#000000',
  },
}

SCSS

$custom: #428ea1;
$custom-light: #7fafbc;
$custom-dark: #000000;

JSON

{
  "hex": "#428ea1",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 161
  },
  "hsl": {
    "h": 192,
    "s": 41.85,
    "l": 44.51
  },
  "oklch": {
    "l": 0.60637,
    "c": 0.07984,
    "h": 216.6
  },
  "luminance": 0.23077
}

Semantic roles & 50–950 ramp

primary

#428EA1

secondary

#BB8F83

accent

#6F56D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428EA1

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

Preview Lab → · Contrast checker → · Palette generator →