#428EE9#428EE9

#428EE9 is a light, vivid cyan. Relative luminance 0.264; OKLCH L 64.3% C 0.156 H 254.7°. Best body text is #000000 at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#428EE9
RGB	rgb(66, 142, 233)
HSL	hsl(213, 79%, 59%)
HSV	hsv(213, 72%, 91%)
CMYK	cmyk(71.7%, 39.1%, 0%, 8.6%)
CIE-LAB	lab(58.40, 6.45, -52.77)
CIE-LCH	lch(58.40, 53.16, 276.97°)
OKLab	oklab(64.27% -0.0413 -0.1505)
OKLCH	oklch(64.27% 0.156 254.7)
XYZ	xyz(26.6223, 26.3845, 80.7647)
Luminance	0.2639 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EE9 #E99D42

analogous

#42E1E9 #428EE9 #4942E9

triadic

#428EE9 #E9428E #8EE942

tetradic

#428EE9 #E942E1 #E99D42 #42E949

square

#428EE9 #E942E1 #E99D42 #42E949

split-complementary

#428EE9 #E94942 #E1E942

monochromatic

#12529E #196ED5 #428EE9 #79AFEF #B0D0F6

Accessibility & contrast

On white

3.35

#428EE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.28

#428EE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EE9

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EE9	#FFFFFF	#000000	##000000
##428EE9	1.00	3.35	6.28	6.28
#FFFFFF	3.35	1.00	21.00	21.00
#000000	6.28	21.00	1.00	1.00
##000000	6.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6395ED

Deuteranopia (green-blind)

#4985E7

Tritanopia (blue-blind)

#00A3B0

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428ee9;
/* rgb */ color: rgb(66, 142, 233);
/* oklch */ color: oklch(64.3% 0.156 254.7);

Tailwind

colors: {
  custom: {
    50: '#8aaef0',
    500: '#428ee9',
    950: '#000000',
  },
}

SCSS

$custom: #428ee9;
$custom-light: #8aaef0;
$custom-dark: #000000;

JSON

{
  "hex": "#428ee9",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 233
  },
  "hsl": {
    "h": 212.695,
    "s": 79.147,
    "l": 58.627
  },
  "oklch": {
    "l": 0.64272,
    "c": 0.15606,
    "h": 254.7
  },
  "luminance": 0.26387
}

Semantic roles & 50–950 ramp

primary

#428EE9

secondary

#E4C6A2

accent

#9D32F6

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1017

muted

#7E7F85

Preview Lab

Preview with #428EE9

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

Preview Lab → · Contrast checker → · Palette generator →