#42C3DD#42C3DD

#42C3DD is a light, moderate cyan. Relative luminance 0.454; OKLCH L 75.8% C 0.115 H 214.0°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#42C3DD
RGB	rgb(66, 195, 221)
HSL	hsl(190, 70%, 56%)
HSV	hsv(190, 70%, 87%)
CMYK	cmyk(70.1%, 11.8%, 0%, 13.3%)
CIE-LAB	lab(73.16, -26.58, -23.16)
CIE-LCH	lch(73.16, 35.25, 221.07°)
OKLab	oklab(75.81% -0.0956 -0.0645)
OKLCH	oklch(75.81% 0.115 214)
XYZ	xyz(34.8075, 45.4049, 75.3222)
Luminance	0.4541 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C3DD #DD5C42

analogous

#42DDAA #42C3DD #4276DD

triadic

#42C3DD #DD42C3 #C3DD42

tetradic

#42C3DD #AA42DD #DD5C42 #76DD42

square

#42C3DD #AA42DD #DD5C42 #76DD42

split-complementary

#42C3DD #DD4276 #DDAA42

monochromatic

#19788C #22A5BF #42C3DD #76D3E6 #AAE4F0

Accessibility & contrast

On white

2.08

#42C3DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.08

#42C3DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C3DD

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C3DD	#FFFFFF	#000000	##000000
##42C3DD	1.00	2.08	10.08	10.08
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.08	21.00	1.00	1.00
##000000	10.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0BDDF

Deuteranopia (green-blind)

#9AADDD

Tritanopia (blue-blind)

#00CDCB

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #42c3dd;
/* rgb */ color: rgb(66, 195, 221);
/* oklch */ color: oklch(75.8% 0.115 214.0);

Tailwind

colors: {
  custom: {
    50: '#8ad5e7',
    500: '#42c3dd',
    950: '#000000',
  },
}

SCSS

$custom: #42c3dd;
$custom-light: #8ad5e7;
$custom-dark: #000000;

JSON

{
  "hex": "#42c3dd",
  "rgb": {
    "r": 66,
    "g": 195,
    "b": 221
  },
  "hsl": {
    "h": 190.065,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.75811,
    "c": 0.11532,
    "h": 214
  },
  "luminance": 0.45409
}

Semantic roles & 50–950 ramp

primary

#42C3DD

secondary

#DDA89D

accent

#593BEC

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0D1416

muted

#7E8384

Preview Lab

Preview with #42C3DD

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

Preview Lab → · Contrast checker → · Palette generator →