#428CC0#428CC0

#428CC0 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.6% C 0.108 H 242.1°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#428CC0
RGB	rgb(66, 140, 192)
HSL	hsl(205, 50%, 51%)
HSV	hsv(205, 66%, 75%)
CMYK	cmyk(65.6%, 27.1%, 0%, 24.7%)
CIE-LAB	lab(55.80, -6.58, -33.84)
CIE-LCH	lch(55.80, 34.48, 259.00°)
OKLab	oklab(61.57% -0.0505 -0.0953)
OKLCH	oklch(61.57% 0.108 242.1)
XYZ	xyz(21.1357, 23.7180, 53.3231)
Luminance	0.2372 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC0 #C07642

analogous

#42C0B5 #428CC0 #424DC0

triadic

#428CC0 #C0428C #8CC042

tetradic

#428CC0 #B542C0 #C07642 #4DC042

square

#428CC0 #B542C0 #C07642 #4DC042

split-complementary

#428CC0 #C0424D #C0B542

monochromatic

#224A66 #316B94 #428CC0 #70A8CF #9EC4DF

Accessibility & contrast

On white

3.66

#428CC0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#428CC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC0

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC0	#FFFFFF	#000000	##000000
##428CC0	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#758DC2

Deuteranopia (green-blind)

#6380BF

Tritanopia (blue-blind)

#00999E

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428cc0;
/* rgb */ color: rgb(66, 140, 192);
/* oklch */ color: oklch(61.6% 0.108 242.1);

Tailwind

colors: {
  custom: {
    50: '#83add3',
    500: '#428cc0',
    950: '#000000',
  },
}

SCSS

$custom: #428cc0;
$custom-light: #83add3;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc0",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 192
  },
  "hsl": {
    "h": 204.762,
    "s": 50,
    "l": 50.588
  },
  "oklch": {
    "l": 0.61573,
    "c": 0.10789,
    "h": 242.1
  },
  "luminance": 0.2372
}

Semantic roles & 50–950 ramp

primary

#428CC0

secondary

#CBAA93

accent

#884EDA

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428CC0

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

Preview Lab → · Contrast checker → · Palette generator →