#428FBE#428FBE

#428FBE is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.2% C 0.104 H 238.4°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#428FBE
RGB	rgb(66, 143, 190)
HSL	hsl(203, 49%, 50%)
HSV	hsv(203, 65%, 75%)
CMYK	cmyk(65.3%, 24.7%, 0%, 25.5%)
CIE-LAB	lab(56.60, -8.96, -31.46)
CIE-LCH	lch(56.60, 32.71, 254.11°)
OKLab	oklab(62.18% -0.0544 -0.0884)
OKLCH	oklch(62.18% 0.104 238.4)
XYZ	xyz(21.3599, 24.5187, 52.3121)
Luminance	0.2452 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FBE #BE7142

analogous

#42BEAF #428FBE #4251BE

triadic

#428FBE #BE428F #8FBE42

tetradic

#428FBE #AF42BE #BE7142 #51BE42

square

#428FBE #AF42BE #BE7142 #51BE42

split-complementary

#428FBE #BE4251 #BEAF42

monochromatic

#224B63 #326D91 #428FBE #70AACE #9DC5DD

Accessibility & contrast

On white

3.56

#428FBE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#428FBE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FBE

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FBE	#FFFFFF	#000000	##000000
##428FBE	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798FC0

Deuteranopia (green-blind)

#6882BD

Tritanopia (blue-blind)

#009B9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fbe;
/* rgb */ color: rgb(66, 143, 190);
/* oklch */ color: oklch(62.2% 0.104 238.4);

Tailwind

colors: {
  custom: {
    50: '#83afd1',
    500: '#428fbe',
    950: '#000000',
  },
}

SCSS

$custom: #428fbe;
$custom-light: #83afd1;
$custom-dark: #000000;

JSON

{
  "hex": "#428fbe",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 190
  },
  "hsl": {
    "h": 202.742,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.62177,
    "c": 0.10379,
    "h": 238.4
  },
  "luminance": 0.24521
}

Semantic roles & 50–950 ramp

primary

#428FBE

secondary

#CAA792

accent

#834FD8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428FBE

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

Preview Lab → · Contrast checker → · Palette generator →