#428EB9#428EB9

#428EB9 is a mid, moderate cyan. Relative luminance 0.240; OKLCH L 61.7% C 0.099 H 236.3°. Best body text is #000000 at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#428EB9
RGB	rgb(66, 142, 185)
HSL	hsl(202, 47%, 49%)
HSV	hsv(202, 64%, 73%)
CMYK	cmyk(64.3%, 23.2%, 0%, 27.5%)
CIE-LAB	lab(56.09, -10.05, -29.42)
CIE-LCH	lch(56.09, 31.09, 251.14°)
OKLab	oklab(61.7% -0.055 -0.0825)
OKLCH	oklch(61.7% 0.099 236.3)
XYZ	xyz(20.6734, 24.0049, 49.4334)
Luminance	0.2401 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB9 #B96D42

analogous

#42B9A9 #428EB9 #4253B9

triadic

#428EB9 #B9428E #8EB942

tetradic

#428EB9 #A942B9 #B96D42 #53B942

square

#428EB9 #A942B9 #B96D42 #53B942

split-complementary

#428EB9 #B94253 #B9A942

monochromatic

#22495F #326B8C #428EB9 #6DA9CB #9AC4DB

Accessibility & contrast

On white

3.62

#428EB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.80

#428EB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB9

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB9	#FFFFFF	#000000	##000000
##428EB9	1.00	3.62	5.80	5.80
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.80	21.00	1.00	1.00
##000000	5.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8DBB

Deuteranopia (green-blind)

#6981B8

Tritanopia (blue-blind)

#00999C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428eb9;
/* rgb */ color: rgb(66, 142, 185);
/* oklch */ color: oklch(61.7% 0.099 236.3);

Tailwind

colors: {
  custom: {
    50: '#82afce',
    500: '#428eb9',
    950: '#000000',
  },
}

SCSS

$custom: #428eb9;
$custom-light: #82afce;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb9",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 185
  },
  "hsl": {
    "h": 201.681,
    "s": 47.41,
    "l": 49.216
  },
  "oklch": {
    "l": 0.61701,
    "c": 0.09919,
    "h": 236.3
  },
  "luminance": 0.24007
}

Semantic roles & 50–950 ramp

primary

#428EB9

secondary

#C7A490

accent

#8151D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428EB9

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

Preview Lab → · Contrast checker → · Palette generator →