#428CB2#428CB2

#428CB2 is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.9% C 0.093 H 233.6°. Best body text is #000000 at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#428CB2
RGB	rgb(66, 140, 178)
HSL	hsl(200, 46%, 48%)
HSV	hsv(200, 63%, 70%)
CMYK	cmyk(62.9%, 21.3%, 0%, 30.2%)
CIE-LAB	lab(55.20, -11.22, -26.80)
CIE-LCH	lch(55.20, 29.06, 247.29°)
OKLab	oklab(60.9% -0.0553 -0.075)
OKLCH	oklch(60.9% 0.093 233.6)
XYZ	xyz(19.6576, 23.1268, 45.5388)
Luminance	0.2313 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CB2 #B26842

analogous

#42B2A0 #428CB2 #4254B2

triadic

#428CB2 #B2428C #8CB242

tetradic

#428CB2 #A042B2 #B26842 #54B242

square

#428CB2 #A042B2 #B26842 #54B242

split-complementary

#428CB2 #B24254 #B2A042

monochromatic

#214659 #316985 #428CB2 #6AA8C8 #96C2D8

Accessibility & contrast

On white

3.73

#428CB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.63

#428CB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CB2

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CB2	#FFFFFF	#000000	##000000
##428CB2	1.00	3.73	5.63	5.63
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.63	21.00	1.00	1.00
##000000	5.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8BB4

Deuteranopia (green-blind)

#6A7FB1

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428cb2;
/* rgb */ color: rgb(66, 140, 178);
/* oklch */ color: oklch(60.9% 0.093 233.6);

Tailwind

colors: {
  custom: {
    50: '#81adc9',
    500: '#428cb2',
    950: '#000000',
  },
}

SCSS

$custom: #428cb2;
$custom-light: #81adc9;
$custom-dark: #000000;

JSON

{
  "hex": "#428cb2",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 178
  },
  "hsl": {
    "h": 200.357,
    "s": 45.902,
    "l": 47.843
  },
  "oklch": {
    "l": 0.60897,
    "c": 0.09324,
    "h": 233.6
  },
  "luminance": 0.23129
}

Semantic roles & 50–950 ramp

primary

#428CB2

secondary

#C49F8C

accent

#7F52D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428CB2

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

Preview Lab → · Contrast checker → · Palette generator →