#428DE9#428DE9

#428DE9 is a light, vivid cyan. Relative luminance 0.261; OKLCH L 64.1% C 0.157 H 255.1°. Best body text is #000000 at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#428DE9
RGB	rgb(66, 141, 233)
HSL	hsl(213, 79%, 59%)
HSV	hsv(213, 72%, 91%)
CMYK	cmyk(71.7%, 39.5%, 0%, 8.6%)
CIE-LAB	lab(58.12, 7.05, -53.21)
CIE-LCH	lch(58.12, 53.68, 277.55°)
OKLab	oklab(64.05% -0.0404 -0.1518)
OKLCH	oklch(64.05% 0.157 255.1)
XYZ	xyz(26.4742, 26.0883, 80.7153)
Luminance	0.2609 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DE9 #E99E42

analogous

#42E0E9 #428DE9 #4A42E9

triadic

#428DE9 #E9428D #8DE942

tetradic

#428DE9 #E942E0 #E99E42 #42E94A

square

#428DE9 #E942E0 #E99E42 #42E94A

split-complementary

#428DE9 #E94A42 #E0E942

monochromatic

#12519E #196DD5 #428DE9 #79AEEF #B0CFF6

Accessibility & contrast

On white

3.38

#428DE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.22

#428DE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DE9

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DE9	#FFFFFF	#000000	##000000
##428DE9	1.00	3.38	6.22	6.22
#FFFFFF	3.38	1.00	21.00	21.00
#000000	6.22	21.00	1.00	1.00
##000000	6.22	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6294ED

Deuteranopia (green-blind)

#4785E7

Tritanopia (blue-blind)

#00A3B0

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428de9;
/* rgb */ color: rgb(66, 141, 233);
/* oklch */ color: oklch(64.1% 0.157 255.1);

Tailwind

colors: {
  custom: {
    50: '#8aadf0',
    500: '#428de9',
    950: '#000000',
  },
}

SCSS

$custom: #428de9;
$custom-light: #8aadf0;
$custom-dark: #000000;

JSON

{
  "hex": "#428de9",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 233
  },
  "hsl": {
    "h": 213.054,
    "s": 79.147,
    "l": 58.627
  },
  "oklch": {
    "l": 0.64054,
    "c": 0.1571,
    "h": 255.1
  },
  "luminance": 0.26091
}

Semantic roles & 50–950 ramp

primary

#428DE9

secondary

#E4C7A2

accent

#9E32F6

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1017

muted

#7E7F85

Preview Lab

Preview with #428DE9

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

Preview Lab → · Contrast checker → · Palette generator →