#428AB8#428AB8

#428AB8 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.7% C 0.100 H 239.4°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#428AB8
RGB	rgb(66, 138, 184)
HSL	hsl(203, 47%, 49%)
HSV	hsv(203, 64%, 72%)
CMYK	cmyk(64.1%, 25%, 0%, 27.8%)
CIE-LAB	lab(54.86, -8.11, -30.76)
CIE-LCH	lch(54.86, 31.82, 255.22°)
OKLab	oklab(60.71% -0.0511 -0.0864)
OKLCH	oklch(60.71% 0.1 239.4)
XYZ	xyz(19.9837, 22.7939, 48.6846)
Luminance	0.2280 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428AB8 #B87042

analogous

#42B8AB #428AB8 #424FB8

triadic

#428AB8 #B8428A #8AB842

tetradic

#428AB8 #AB42B8 #B87042 #4FB842

square

#428AB8 #AB42B8 #B87042 #4FB842

split-complementary

#428AB8 #B8424F #B8AB42

monochromatic

#22465E #32688B #428AB8 #6DA6CB #9AC1DB

Accessibility & contrast

On white

3.78

#428AB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#428AB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428AB8

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428AB8	#FFFFFF	#000000	##000000
##428AB8	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#758ABA

Deuteranopia (green-blind)

#657EB7

Tritanopia (blue-blind)

#00969A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ab8;
/* rgb */ color: rgb(66, 138, 184);
/* oklch */ color: oklch(60.7% 0.100 239.4);

Tailwind

colors: {
  custom: {
    50: '#82accd',
    500: '#428ab8',
    950: '#000000',
  },
}

SCSS

$custom: #428ab8;
$custom-light: #82accd;
$custom-dark: #000000;

JSON

{
  "hex": "#428ab8",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 184
  },
  "hsl": {
    "h": 203.39,
    "s": 47.2,
    "l": 49.02
  },
  "oklch": {
    "l": 0.60708,
    "c": 0.1004,
    "h": 239.4
  },
  "luminance": 0.22796
}

Semantic roles & 50–950 ramp

primary

#428AB8

secondary

#C7A58F

accent

#8551D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428AB8

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

Preview Lab → · Contrast checker → · Palette generator →