#428FDE#428FDE

#428FDE is a light, vivid cyan. Relative luminance 0.261; OKLCH L 63.9% C 0.141 H 251.5°. Best body text is #000000 at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#428FDE
RGB	rgb(66, 143, 222)
HSL	hsl(210, 70%, 56%)
HSV	hsv(210, 70%, 87%)
CMYK	cmyk(70.3%, 35.6%, 0%, 12.9%)
CIE-LAB	lab(58.11, 1.99, -47.11)
CIE-LCH	lch(58.11, 47.15, 272.42°)
OKLab	oklab(63.86% -0.0448 -0.1339)
OKLCH	oklch(63.86% 0.141 251.5)
XYZ	xyz(25.2491, 26.0744, 72.7952)
Luminance	0.2608 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FDE #DE9142

analogous

#42DDDE #428FDE #4342DE

triadic

#428FDE #DE428F #8FDE42

tetradic

#428FDE #DE42DD #DE9142 #42DE43

square

#428FDE #DE42DD #DE9142 #42DE43

split-complementary

#428FDE #DE4342 #DDDE42

monochromatic

#19528D #2270C1 #428FDE #76AEE7 #AACDF0

Accessibility & contrast

On white

3.38

#428FDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.22

#428FDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FDE

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FDE	#FFFFFF	#000000	##000000
##428FDE	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)

#6B94E1

Deuteranopia (green-blind)

#5585DC

Tritanopia (blue-blind)

#00A2AC

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #428fde;
/* rgb */ color: rgb(66, 143, 222);
/* oklch */ color: oklch(63.9% 0.141 251.5);

Tailwind

colors: {
  custom: {
    50: '#88afe8',
    500: '#428fde',
    950: '#000000',
  },
}

SCSS

$custom: #428fde;
$custom-light: #88afe8;
$custom-dark: #000000;

JSON

{
  "hex": "#428fde",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 222
  },
  "hsl": {
    "h": 210.385,
    "s": 70.27,
    "l": 56.471
  },
  "oklch": {
    "l": 0.63856,
    "c": 0.14122,
    "h": 251.5
  },
  "luminance": 0.26077
}

Semantic roles & 50–950 ramp

primary

#428FDE

secondary

#DEBE9E

accent

#953BED

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428FDE

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

Preview Lab → · Contrast checker → · Palette generator →