#428AB5#428AB5

#428AB5 is a mid, moderate cyan. Relative luminance 0.227; OKLCH L 60.6% C 0.097 H 237.6°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#428AB5
RGB	rgb(66, 138, 181)
HSL	hsl(202, 47%, 48%)
HSV	hsv(202, 64%, 71%)
CMYK	cmyk(63.5%, 23.8%, 0%, 29%)
CIE-LAB	lab(54.73, -9.11, -29.25)
CIE-LCH	lch(54.73, 30.64, 252.70°)
OKLab	oklab(60.56% -0.0521 -0.0821)
OKLCH	oklch(60.56% 0.097 237.6)
XYZ	xyz(19.6725, 22.6694, 47.0460)
Luminance	0.2267 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AB5 #B56D42

analogous

#42B5A6 #428AB5 #4250B5

triadic

#428AB5 #B5428A #8AB542

tetradic

#428AB5 #A642B5 #B56D42 #50B542

square

#428AB5 #A642B5 #B56D42 #50B542

split-complementary

#428AB5 #B54250 #B5A642

monochromatic

#21465B #326888 #428AB5 #6BA6C9 #98C1D9

Accessibility & contrast

On white

3.79

#428AB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#428AB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AB5

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AB5	#FFFFFF	#000000	##000000
##428AB5	1.00	3.79	5.53	5.53
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B7

Deuteranopia (green-blind)

#667EB4

Tritanopia (blue-blind)

#009599

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ab5;
/* rgb */ color: rgb(66, 138, 181);
/* oklch */ color: oklch(60.6% 0.097 237.6);

Tailwind

colors: {
  custom: {
    50: '#82accb',
    500: '#428ab5',
    950: '#000000',
  },
}

SCSS

$custom: #428ab5;
$custom-light: #82accb;
$custom-dark: #000000;

JSON

{
  "hex": "#428ab5",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 181
  },
  "hsl": {
    "h": 202.435,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.60563,
    "c": 0.09722,
    "h": 237.6
  },
  "luminance": 0.22671
}

Semantic roles & 50–950 ramp

primary

#428AB5

secondary

#C5A28E

accent

#8352D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428AB5

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

Preview Lab → · Contrast checker → · Palette generator →