#428CA3#428CA3

#428CA3 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.2% C 0.081 H 221.0°. Best body text is #000000 at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#428CA3
RGB	rgb(66, 140, 163)
HSL	hsl(194, 42%, 45%)
HSV	hsv(194, 60%, 64%)
CMYK	cmyk(59.5%, 14.1%, 0%, 36.1%)
CIE-LAB	lab(54.61, -16.00, -19.11)
CIE-LCH	lch(54.61, 24.92, 230.06°)
OKLab	oklab(60.23% -0.0611 -0.0531)
OKLCH	oklch(60.23% 0.081 221)
XYZ	xyz(18.2331, 22.5570, 38.0363)
Luminance	0.2256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CA3 #A35942

analogous

#42A38A #428CA3 #425BA3

triadic

#428CA3 #A3428C #8CA342

tetradic

#428CA3 #8A42A3 #A35942 #5BA342

square

#428CA3 #8A42A3 #A35942 #5BA342

split-complementary

#428CA3 #A3425B #A38A42

monochromatic

#1F414C #306777 #428CA3 #63AAC0 #8EC1D1

Accessibility & contrast

On white

3.81

#428CA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.51

#428CA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CA3

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CA3	#FFFFFF	#000000	##000000
##428CA3	1.00	3.81	5.51	5.51
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.51	21.00	1.00	1.00
##000000	5.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E89A4

Deuteranopia (green-blind)

#707EA3

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ca3;
/* rgb */ color: rgb(66, 140, 163);
/* oklch */ color: oklch(60.2% 0.081 221.0);

Tailwind

colors: {
  custom: {
    50: '#80adbe',
    500: '#428ca3',
    950: '#000000',
  },
}

SCSS

$custom: #428ca3;
$custom-light: #80adbe;
$custom-dark: #000000;

JSON

{
  "hex": "#428ca3",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 163
  },
  "hsl": {
    "h": 194.227,
    "s": 42.358,
    "l": 44.902
  },
  "oklch": {
    "l": 0.60232,
    "c": 0.08093,
    "h": 221
  },
  "luminance": 0.22559
}

Semantic roles & 50–950 ramp

primary

#428CA3

secondary

#BC9284

accent

#7356D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428CA3

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

Preview Lab → · Contrast checker → · Palette generator →