#428FE7#428FE7

#428FE7 is a light, vivid cyan. Relative luminance 0.266; OKLCH L 64.4% C 0.152 H 253.8°. Best body text is #000000 at 6.31:1 contrast (WCAG AA passes).

Color values

HEX	#428FE7
RGB	rgb(66, 143, 231)
HSL	hsl(212, 77%, 58%)
HSV	hsv(212, 71%, 91%)
CMYK	cmyk(71.4%, 38.1%, 0%, 9.4%)
CIE-LAB	lab(58.57, 5.15, -51.38)
CIE-LCH	lch(58.57, 51.64, 275.73°)
OKLab	oklab(64.37% -0.0426 -0.1464)
OKLCH	oklch(64.37% 0.153 253.8)
XYZ	xyz(26.4877, 26.5698, 79.3183)
Luminance	0.2657 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FE7 #E79A42

analogous

#42E2E7 #428FE7 #4742E7

triadic

#428FE7 #E7428F #8FE742

tetradic

#428FE7 #E742E2 #E79A42 #42E747

square

#428FE7 #E742E2 #E79A42 #42E747

split-complementary

#428FE7 #E74742 #E2E742

monochromatic

#14539B #1B70D1 #428FE7 #78AFEE #AFCFF5

Accessibility & contrast

On white

3.33

#428FE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.31

#428FE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FE7

6.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FE7	#FFFFFF	#000000	##000000
##428FE7	1.00	3.33	6.31	6.31
#FFFFFF	3.33	1.00	21.00	21.00
#000000	6.31	21.00	1.00	1.00
##000000	6.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6695EB

Deuteranopia (green-blind)

#4D86E5

Tritanopia (blue-blind)

#00A4B0

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #428fe7;
/* rgb */ color: rgb(66, 143, 231);
/* oklch */ color: oklch(64.4% 0.152 253.8);

Tailwind

colors: {
  custom: {
    50: '#8aafef',
    500: '#428fe7',
    950: '#000000',
  },
}

SCSS

$custom: #428fe7;
$custom-light: #8aafef;
$custom-dark: #000000;

JSON

{
  "hex": "#428fe7",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 231
  },
  "hsl": {
    "h": 212,
    "s": 77.465,
    "l": 58.235
  },
  "oklch": {
    "l": 0.64372,
    "c": 0.1525,
    "h": 253.8
  },
  "luminance": 0.26573
}

Semantic roles & 50–950 ramp

primary

#428FE7

secondary

#E3C5A2

accent

#9A34F4

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #428FE7

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

Preview Lab → · Contrast checker → · Palette generator →