#428CE5#428CE5

#428CE5 is a light, vivid cyan. Relative luminance 0.256; OKLCH L 63.6% C 0.153 H 254.7°. Best body text is #000000 at 6.11:1 contrast (WCAG AA passes).

Color values

HEX	#428CE5
RGB	rgb(66, 140, 229)
HSL	hsl(213, 76%, 58%)
HSV	hsv(213, 71%, 90%)
CMYK	cmyk(71.2%, 38.9%, 0%, 10.2%)
CIE-LAB	lab(57.63, 6.23, -51.78)
CIE-LCH	lch(57.63, 52.15, 276.86°)
OKLab	oklab(63.6% -0.0404 -0.1476)
OKLCH	oklch(63.6% 0.153 254.7)
XYZ	xyz(25.7625, 25.5687, 77.6911)
Luminance	0.2557 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CE5 #E59B42

analogous

#42DDE5 #428CE5 #4A42E5

triadic

#428CE5 #E5428C #8CE542

tetradic

#428CE5 #E542DD #E59B42 #42E54A

square

#428CE5 #E542DD #E59B42 #42E54A

split-complementary

#428CE5 #E54A42 #DDE542

monochromatic

#155098 #1C6DCE #428CE5 #78ADEC #AECDF4

Accessibility & contrast

On white

3.43

#428CE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.11

#428CE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CE5

6.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CE5	#FFFFFF	#000000	##000000
##428CE5	1.00	3.43	6.11	6.11
#FFFFFF	3.43	1.00	21.00	21.00
#000000	6.11	21.00	1.00	1.00
##000000	6.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6393E9

Deuteranopia (green-blind)

#4983E3

Tritanopia (blue-blind)

#00A1AD

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #428ce5;
/* rgb */ color: rgb(66, 140, 229);
/* oklch */ color: oklch(63.6% 0.153 254.7);

Tailwind

colors: {
  custom: {
    50: '#89adee',
    500: '#428ce5',
    950: '#000000',
  },
}

SCSS

$custom: #428ce5;
$custom-light: #89adee;
$custom-dark: #000000;

JSON

{
  "hex": "#428ce5",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 229
  },
  "hsl": {
    "h": 212.761,
    "s": 75.814,
    "l": 57.843
  },
  "oklch": {
    "l": 0.63598,
    "c": 0.15304,
    "h": 254.7
  },
  "luminance": 0.25572
}

Semantic roles & 50–950 ramp

primary

#428CE5

secondary

#E2C4A1

accent

#9D35F2

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428CE5

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

Preview Lab → · Contrast checker → · Palette generator →