#42B3CC#42B3CC

#42B3CC is a light, moderate cyan. Relative luminance 0.378; OKLCH L 71.3% C 0.106 H 215.3°. Best body text is #000000 at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#42B3CC
RGB	rgb(66, 179, 204)
HSL	hsl(191, 58%, 53%)
HSV	hsv(191, 68%, 80%)
CMYK	cmyk(67.6%, 12.3%, 0%, 20%)
CIE-LAB	lab(67.84, -23.76, -21.98)
CIE-LCH	lch(67.84, 32.37, 222.77°)
OKLab	oklab(71.34% -0.0864 -0.0612)
OKLCH	oklch(71.34% 0.106 215.3)
XYZ	xyz(29.2614, 37.7548, 62.8603)
Luminance	0.3776 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B3CC #CC5B42

analogous

#42CCA0 #42B3CC #426ECC

triadic

#42B3CC #CC42B3 #B3CC42

tetradic

#42B3CC #A042CC #CC5B42 #6ECC42

square

#42B3CC #A042CC #CC5B42 #6ECC42

split-complementary

#42B3CC #CC426E #CCA042

monochromatic

#1F6574 #2C8FA4 #42B3CC #72C6D9 #A2DAE6

Accessibility & contrast

On white

2.46

#42B3CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.55

#42B3CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B3CC

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B3CC	#FFFFFF	#000000	##000000
##42B3CC	1.00	2.46	8.55	8.55
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.55	21.00	1.00	1.00
##000000	8.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2AECD

Deuteranopia (green-blind)

#8E9FCC

Tritanopia (blue-blind)

#00BCBB

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #42b3cc;
/* rgb */ color: rgb(66, 179, 204);
/* oklch */ color: oklch(71.3% 0.106 215.3);

Tailwind

colors: {
  custom: {
    50: '#87cadb',
    500: '#42b3cc',
    950: '#000000',
  },
}

SCSS

$custom: #42b3cc;
$custom-light: #87cadb;
$custom-dark: #000000;

JSON

{
  "hex": "#42b3cc",
  "rgb": {
    "r": 66,
    "g": 179,
    "b": 204
  },
  "hsl": {
    "h": 190.87,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.71335,
    "c": 0.10584,
    "h": 215.3
  },
  "luminance": 0.37758
}

Semantic roles & 50–950 ramp

primary

#42B3CC

secondary

#D3A297

accent

#6347E1

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B3CC

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

Preview Lab → · Contrast checker → · Palette generator →