#42B4DC#42B4DC

#42B4DC is a light, moderate cyan. Relative luminance 0.390; OKLCH L 72.2% C 0.116 H 225.4°. Best body text is #000000 at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#42B4DC
RGB	rgb(66, 180, 220)
HSL	hsl(196, 69%, 56%)
HSV	hsv(196, 70%, 86%)
CMYK	cmyk(70%, 18.2%, 0%, 13.7%)
CIE-LAB	lab(68.73, -19.25, -29.41)
CIE-LCH	lch(68.73, 35.15, 236.79°)
OKLab	oklab(72.24% -0.0812 -0.0823)
OKLCH	oklch(72.24% 0.116 225.4)
XYZ	xyz(31.4810, 38.9645, 73.5580)
Luminance	0.3897 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4DC #DC6A42

analogous

#42DCB7 #42B4DC #4267DC

triadic

#42B4DC #DC42B4 #B4DC42

tetradic

#42B4DC #B742DC #DC6A42 #67DC42

square

#42B4DC #B742DC #DC6A42 #67DC42

split-complementary

#42B4DC #DC4267 #DCB742

monochromatic

#1A6D8A #2396BE #42B4DC #76C8E6 #A9DDEF

Accessibility & contrast

On white

2.39

#42B4DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.79

#42B4DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4DC

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4DC	#FFFFFF	#000000	##000000
##42B4DC	1.00	2.39	8.79	8.79
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.79	21.00	1.00	1.00
##000000	8.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB0DE

Deuteranopia (green-blind)

#89A1DC

Tritanopia (blue-blind)

#00C0C1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b4dc;
/* rgb */ color: rgb(66, 180, 220);
/* oklch */ color: oklch(72.2% 0.116 225.4);

Tailwind

colors: {
  custom: {
    50: '#89cae7',
    500: '#42b4dc',
    950: '#000000',
  },
}

SCSS

$custom: #42b4dc;
$custom-light: #89cae7;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4dc",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 220
  },
  "hsl": {
    "h": 195.584,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.72241,
    "c": 0.11566,
    "h": 225.4
  },
  "luminance": 0.38968
}

Semantic roles & 50–950 ramp

primary

#42B4DC

secondary

#DDAE9D

accent

#6A3CEC

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B4DC

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

Preview Lab → · Contrast checker → · Palette generator →