#42B1CC#42B1CC

#42B1CC is a light, moderate cyan. Relative luminance 0.370; OKLCH L 70.9% C 0.106 H 217.1°. Best body text is #000000 at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#42B1CC
RGB	rgb(66, 177, 204)
HSL	hsl(192, 58%, 53%)
HSV	hsv(192, 68%, 80%)
CMYK	cmyk(67.6%, 13.2%, 0%, 20%)
CIE-LAB	lab(67.25, -22.74, -22.89)
CIE-LCH	lch(67.25, 32.27, 225.18°)
OKLab	oklab(70.86% -0.0843 -0.0638)
OKLCH	oklch(70.86% 0.106 217.1)
XYZ	xyz(28.8635, 36.9590, 62.7277)
Luminance	0.3696 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B1CC #CC5D42

analogous

#42CCA2 #42B1CC #426CCC

triadic

#42B1CC #CC42B1 #B1CC42

tetradic

#42B1CC #A242CC #CC5D42 #6CCC42

square

#42B1CC #A242CC #CC5D42 #6CCC42

split-complementary

#42B1CC #CC426C #CCA242

monochromatic

#1F6474 #2C8DA4 #42B1CC #72C5D9 #A2D9E6

Accessibility & contrast

On white

2.50

#42B1CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.39

#42B1CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B1CC

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B1CC	#FFFFFF	#000000	##000000
##42B1CC	1.00	2.50	8.39	8.39
#FFFFFF	2.50	1.00	21.00	21.00
#000000	8.39	21.00	1.00	1.00
##000000	8.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FACCE

Deuteranopia (green-blind)

#8C9ECC

Tritanopia (blue-blind)

#00BBB9

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #42b1cc;
/* rgb */ color: rgb(66, 177, 204);
/* oklch */ color: oklch(70.9% 0.106 217.1);

Tailwind

colors: {
  custom: {
    50: '#87c8db',
    500: '#42b1cc',
    950: '#000000',
  },
}

SCSS

$custom: #42b1cc;
$custom-light: #87c8db;
$custom-dark: #000000;

JSON

{
  "hex": "#42b1cc",
  "rgb": {
    "r": 66,
    "g": 177,
    "b": 204
  },
  "hsl": {
    "h": 191.739,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.70858,
    "c": 0.10572,
    "h": 217.1
  },
  "luminance": 0.36962
}

Semantic roles & 50–950 ramp

primary

#42B1CC

secondary

#D3A397

accent

#6547E1

background

#F8FCFD

surface

#F0F8FB

border

#CBD1D4

text

#0D1315

muted

#7D8283

Preview Lab

Preview with #42B1CC

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

Preview Lab → · Contrast checker → · Palette generator →