#428CB4#428CB4

#428CB4 is a mid, moderate cyan. Relative luminance 0.232; OKLCH L 61.0% C 0.095 H 235.0°. Best body text is #000000 at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#428CB4
RGB	rgb(66, 140, 180)
HSL	hsl(201, 46%, 48%)
HSV	hsv(201, 63%, 71%)
CMYK	cmyk(63.3%, 22.2%, 0%, 29.4%)
CIE-LAB	lab(55.29, -10.57, -27.82)
CIE-LCH	lch(55.29, 29.76, 249.20°)
OKLab	oklab(60.99% -0.0546 -0.0779)
OKLCH	oklch(60.99% 0.095 235)
XYZ	xyz(19.8599, 23.2077, 46.6041)
Luminance	0.2321 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CB4 #B46A42

analogous

#42B4A3 #428CB4 #4253B4

triadic

#428CB4 #B4428C #8CB442

tetradic

#428CB4 #A342B4 #B46A42 #53B442

square

#428CB4 #A342B4 #B46A42 #53B442

split-complementary

#428CB4 #B44253 #B4A342

monochromatic

#21465A #326987 #428CB4 #6BA8C9 #97C2D9

Accessibility & contrast

On white

3.72

#428CB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.64

#428CB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CB4

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CB4	#FFFFFF	#000000	##000000
##428CB4	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)

#798BB6

Deuteranopia (green-blind)

#697FB3

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428cb4;
/* rgb */ color: rgb(66, 140, 180);
/* oklch */ color: oklch(61.0% 0.095 235.0);

Tailwind

colors: {
  custom: {
    50: '#82adca',
    500: '#428cb4',
    950: '#000000',
  },
}

SCSS

$custom: #428cb4;
$custom-light: #82adca;
$custom-dark: #000000;

JSON

{
  "hex": "#428cb4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 180
  },
  "hsl": {
    "h": 201.053,
    "s": 46.341,
    "l": 48.235
  },
  "oklch": {
    "l": 0.6099,
    "c": 0.09518,
    "h": 235
  },
  "luminance": 0.2321
}

Semantic roles & 50–950 ramp

primary

#428CB4

secondary

#C5A18D

accent

#8052D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428CB4

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

Preview Lab → · Contrast checker → · Palette generator →