#428ECD#428ECD

#428ECD is a light, vivid cyan. Relative luminance 0.249; OKLCH L 62.7% C 0.121 H 246.4°. Best body text is #000000 at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#428ECD
RGB	rgb(66, 142, 205)
HSL	hsl(207, 58%, 53%)
HSV	hsv(207, 68%, 80%)
CMYK	cmyk(67.8%, 30.7%, 0%, 19.6%)
CIE-LAB	lab(56.99, -3.32, -39.34)
CIE-LCH	lch(56.99, 39.48, 265.18°)
OKLab	oklab(62.7% -0.0486 -0.1113)
OKLCH	oklch(62.7% 0.121 246.4)
XYZ	xyz(22.9351, 24.9096, 61.3451)
Luminance	0.2491 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ECD #CD8142

analogous

#42CDC6 #428ECD #4248CD

triadic

#428ECD #CD428E #8ECD42

tetradic

#428ECD #C642CD #CD8142 #48CD42

square

#428ECD #C642CD #CD8142 #48CD42

split-complementary

#428ECD #CD4248 #CDC642

monochromatic

#1F4E76 #2C6FA6 #428ECD #72ABDA #A3C8E7

Accessibility & contrast

On white

3.51

#428ECD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.98

#428ECD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ECD

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ECD	#FFFFFF	#000000	##000000
##428ECD	1.00	3.51	5.98	5.98
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.98	21.00	1.00	1.00
##000000	5.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7290D0

Deuteranopia (green-blind)

#5F83CC

Tritanopia (blue-blind)

#009DA4

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428ecd;
/* rgb */ color: rgb(66, 142, 205);
/* oklch */ color: oklch(62.7% 0.121 246.4);

Tailwind

colors: {
  custom: {
    50: '#85aedc',
    500: '#428ecd',
    950: '#000000',
  },
}

SCSS

$custom: #428ecd;
$custom-light: #85aedc;
$custom-dark: #000000;

JSON

{
  "hex": "#428ecd",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 205
  },
  "hsl": {
    "h": 207.194,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.62703,
    "c": 0.1214,
    "h": 246.4
  },
  "luminance": 0.24912
}

Semantic roles & 50–950 ramp

primary

#428ECD

secondary

#D3B397

accent

#8D46E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428ECD

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

Preview Lab → · Contrast checker → · Palette generator →