#428CC3#428CC3

#428CC3 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.7% C 0.111 H 243.5°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#428CC3
RGB	rgb(66, 140, 195)
HSL	hsl(206, 52%, 51%)
HSV	hsv(206, 66%, 76%)
CMYK	cmyk(66.2%, 28.2%, 0%, 23.5%)
CIE-LAB	lab(55.94, -5.57, -35.34)
CIE-LCH	lch(55.94, 35.77, 261.05°)
OKLab	oklab(61.72% -0.0496 -0.0996)
OKLCH	oklch(61.72% 0.111 243.5)
XYZ	xyz(21.4714, 23.8523, 55.0916)
Luminance	0.2386 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC3 #C37942

analogous

#42C3B9 #428CC3 #424BC3

triadic

#428CC3 #C3428C #8CC342

tetradic

#428CC3 #B942C3 #C37942 #4BC342

square

#428CC3 #B942C3 #C37942 #4BC342

split-complementary

#428CC3 #C3424B #C3B942

monochromatic

#214B69 #306C98 #428CC3 #70A8D2 #9FC5E0

Accessibility & contrast

On white

3.64

#428CC3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.77

#428CC3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC3

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC3	#FFFFFF	#000000	##000000
##428CC3	1.00	3.64	5.77	5.77
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.77	21.00	1.00	1.00
##000000	5.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#738DC5

Deuteranopia (green-blind)

#6280C2

Tritanopia (blue-blind)

#00999F

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428cc3;
/* rgb */ color: rgb(66, 140, 195);
/* oklch */ color: oklch(61.7% 0.111 243.5);

Tailwind

colors: {
  custom: {
    50: '#84add5',
    500: '#428cc3',
    950: '#000000',
  },
}

SCSS

$custom: #428cc3;
$custom-light: #84add5;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc3",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 195
  },
  "hsl": {
    "h": 205.581,
    "s": 51.807,
    "l": 51.176
  },
  "oklch": {
    "l": 0.61724,
    "c": 0.1113,
    "h": 243.5
  },
  "luminance": 0.23855
}

Semantic roles & 50–950 ramp

primary

#428CC3

secondary

#CDAC94

accent

#894DDB

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428CC3

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

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