#42C1DD#42C1DD

#42C1DD is a light, moderate cyan. Relative luminance 0.445; OKLCH L 75.3% C 0.115 H 215.6°. Best body text is #000000 at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#42C1DD
RGB	rgb(66, 193, 221)
HSL	hsl(191, 70%, 56%)
HSV	hsv(191, 70%, 87%)
CMYK	cmyk(70.1%, 12.7%, 0%, 13.3%)
CIE-LAB	lab(72.57, -25.58, -24.06)
CIE-LCH	lch(72.57, 35.12, 223.24°)
OKLab	oklab(75.34% -0.0936 -0.067)
OKLCH	oklch(75.34% 0.115 215.6)
XYZ	xyz(34.3624, 44.5147, 75.1738)
Luminance	0.4452 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42C1DD #DD5E42

analogous

#42DDAC #42C1DD #4274DD

triadic

#42C1DD #DD42C1 #C1DD42

tetradic

#42C1DD #AC42DD #DD5E42 #74DD42

square

#42C1DD #AC42DD #DD5E42 #74DD42

split-complementary

#42C1DD #DD4274 #DDAC42

monochromatic

#19778C #22A3BF #42C1DD #76D2E6 #AAE3F0

Accessibility & contrast

On white

2.12

#42C1DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.90

#42C1DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42C1DD

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42C1DD	#FFFFFF	#000000	##000000
##42C1DD	1.00	2.12	9.90	9.90
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.90	21.00	1.00	1.00
##000000	9.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEBBDF

Deuteranopia (green-blind)

#98ABDD

Tritanopia (blue-blind)

#00CBCA

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #42c1dd;
/* rgb */ color: rgb(66, 193, 221);
/* oklch */ color: oklch(75.3% 0.115 215.6);

Tailwind

colors: {
  custom: {
    50: '#8ad4e7',
    500: '#42c1dd',
    950: '#000000',
  },
}

SCSS

$custom: #42c1dd;
$custom-light: #8ad4e7;
$custom-dark: #000000;

JSON

{
  "hex": "#42c1dd",
  "rgb": {
    "r": 66,
    "g": 193,
    "b": 221
  },
  "hsl": {
    "h": 190.839,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.75339,
    "c": 0.11516,
    "h": 215.6
  },
  "luminance": 0.44519
}

Semantic roles & 50–950 ramp

primary

#42C1DD

secondary

#DDA99D

accent

#5B3BEC

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0D1416

muted

#7E8384

Preview Lab

Preview with #42C1DD

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

Preview Lab → · Contrast checker → · Palette generator →