#428CC1#428CC1

#428CC1 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.6% C 0.109 H 242.6°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#428CC1
RGB	rgb(66, 140, 193)
HSL	hsl(205, 51%, 51%)
HSV	hsv(205, 66%, 76%)
CMYK	cmyk(65.8%, 27.5%, 0%, 24.3%)
CIE-LAB	lab(55.85, -6.24, -34.34)
CIE-LCH	lch(55.85, 34.91, 259.70°)
OKLab	oklab(61.62% -0.0502 -0.0968)
OKLCH	oklch(61.62% 0.109 242.6)
XYZ	xyz(21.2468, 23.7625, 53.9086)
Luminance	0.2377 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC1 #C17742

analogous

#42C1B6 #428CC1 #424CC1

triadic

#428CC1 #C1428C #8CC142

tetradic

#428CC1 #B642C1 #C17742 #4CC142

square

#428CC1 #B642C1 #C17742 #4CC142

split-complementary

#428CC1 #C1424C #C1B642

monochromatic

#224A67 #316B95 #428CC1 #70A8D0 #9EC4DF

Accessibility & contrast

On white

3.65

#428CC1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#428CC1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC1

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC1	#FFFFFF	#000000	##000000
##428CC1	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#748DC3

Deuteranopia (green-blind)

#6380C0

Tritanopia (blue-blind)

#00999E

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428cc1;
/* rgb */ color: rgb(66, 140, 193);
/* oklch */ color: oklch(61.6% 0.109 242.6);

Tailwind

colors: {
  custom: {
    50: '#83add4',
    500: '#428cc1',
    950: '#000000',
  },
}

SCSS

$custom: #428cc1;
$custom-light: #83add4;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc1",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 193
  },
  "hsl": {
    "h": 205.039,
    "s": 50.598,
    "l": 50.784
  },
  "oklch": {
    "l": 0.61623,
    "c": 0.10902,
    "h": 242.6
  },
  "luminance": 0.23765
}

Semantic roles & 50–950 ramp

primary

#428CC1

secondary

#CCAB93

accent

#884EDA

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428CC1

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

Preview Lab → · Contrast checker → · Palette generator →