#42B2DD#42B2DD

#42B2DD is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.8% C 0.117 H 227.6°. Best body text is #000000 at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#42B2DD
RGB	rgb(66, 178, 221)
HSL	hsl(197, 70%, 56%)
HSV	hsv(197, 70%, 87%)
CMYK	cmyk(70.1%, 19.5%, 0%, 13.3%)
CIE-LAB	lab(68.18, -17.88, -30.80)
CIE-LCH	lch(68.18, 35.62, 239.86°)
OKLab	oklab(71.82% -0.0789 -0.0863)
OKLCH	oklch(71.82% 0.117 227.6)
XYZ	xyz(31.2130, 38.2160, 74.1240)
Luminance	0.3822 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B2DD #DD6D42

analogous

#42DDBB #42B2DD #4265DD

triadic

#42B2DD #DD42B2 #B2DD42

tetradic

#42B2DD #BB42DD #DD6D42 #65DD42

square

#42B2DD #BB42DD #DD6D42 #65DD42

split-complementary

#42B2DD #DD4265 #DDBB42

monochromatic

#196C8C #2294BF #42B2DD #76C7E6 #AADCF0

Accessibility & contrast

On white

2.43

#42B2DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.64

#42B2DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B2DD

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B2DD	#FFFFFF	#000000	##000000
##42B2DD	1.00	2.43	8.64	8.64
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.64	21.00	1.00	1.00
##000000	8.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BAFDF

Deuteranopia (green-blind)

#869FDC

Tritanopia (blue-blind)

#00BEC0

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b2dd;
/* rgb */ color: rgb(66, 178, 221);
/* oklch */ color: oklch(71.8% 0.117 227.6);

Tailwind

colors: {
  custom: {
    50: '#89c9e7',
    500: '#42b2dd',
    950: '#000000',
  },
}

SCSS

$custom: #42b2dd;
$custom-light: #89c9e7;
$custom-dark: #000000;

JSON

{
  "hex": "#42b2dd",
  "rgb": {
    "r": 66,
    "g": 178,
    "b": 221
  },
  "hsl": {
    "h": 196.645,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.71817,
    "c": 0.11696,
    "h": 227.6
  },
  "luminance": 0.38219
}

Semantic roles & 50–950 ramp

primary

#42B2DD

secondary

#DDAF9D

accent

#6D3BEC

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B2DD

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

Preview Lab → · Contrast checker → · Palette generator →