#428CA1#428CA1

#428CA1 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.1% C 0.080 H 219.0°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#428CA1
RGB	rgb(66, 140, 161)
HSL	hsl(193, 42%, 45%)
HSV	hsv(193, 59%, 63%)
CMYK	cmyk(59%, 13%, 0%, 36.9%)
CIE-LAB	lab(54.54, -16.62, -18.07)
CIE-LCH	lch(54.54, 24.55, 227.40°)
OKLab	oklab(60.15% -0.0619 -0.0502)
OKLCH	oklch(60.15% 0.08 219)
XYZ	xyz(18.0553, 22.4859, 37.1000)
Luminance	0.2249 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CA1 #A15742

analogous

#42A187 #428CA1 #425DA1

triadic

#428CA1 #A1428C #8CA142

tetradic

#428CA1 #8742A1 #A15742 #5DA142

square

#428CA1 #8742A1 #A15742 #5DA142

split-complementary

#428CA1 #A1425D #A18742

monochromatic

#1E414A #306676 #428CA1 #62AABF #8DC1D0

Accessibility & contrast

On white

3.82

#428CA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#428CA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CA1

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CA1	#FFFFFF	#000000	##000000
##428CA1	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F88A2

Deuteranopia (green-blind)

#717EA1

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #428ca1;
/* rgb */ color: rgb(66, 140, 161);
/* oklch */ color: oklch(60.1% 0.080 219.0);

Tailwind

colors: {
  custom: {
    50: '#7fadbc',
    500: '#428ca1',
    950: '#000000',
  },
}

SCSS

$custom: #428ca1;
$custom-light: #7fadbc;
$custom-dark: #000000;

JSON

{
  "hex": "#428ca1",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 161
  },
  "hsl": {
    "h": 193.263,
    "s": 41.85,
    "l": 44.51
  },
  "oklch": {
    "l": 0.60148,
    "c": 0.07965,
    "h": 219
  },
  "luminance": 0.22488
}

Semantic roles & 50–950 ramp

primary

#428CA1

secondary

#BB9083

accent

#7156D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428CA1

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

Preview Lab → · Contrast checker → · Palette generator →