#42ACD9#42ACD9

#42ACD9 is a light, moderate cyan. Relative luminance 0.357; OKLCH L 70.2% C 0.116 H 229.9°. Best body text is #000000 at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#42ACD9
RGB	rgb(66, 172, 217)
HSL	hsl(198, 67%, 55%)
HSV	hsv(198, 70%, 85%)
CMYK	cmyk(69.6%, 20.7%, 0%, 14.9%)
CIE-LAB	lab(66.27, -16.00, -31.56)
CIE-LCH	lch(66.27, 35.38, 243.12°)
OKLab	oklab(70.24% -0.0745 -0.0885)
OKLCH	oklch(70.24% 0.116 229.9)
XYZ	xyz(29.5187, 35.6697, 70.9614)
Luminance	0.3567 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42ACD9 #D96F42

analogous

#42D9BB #42ACD9 #4260D9

triadic

#42ACD9 #D942AC #ACD942

tetradic

#42ACD9 #BB42D9 #D96F42 #60D942

square

#42ACD9 #BB42D9 #D96F42 #60D942

split-complementary

#42ACD9 #D94260 #D9BB42

monochromatic

#1B6686 #258DB9 #42ACD9 #75C2E3 #A8D9ED

Accessibility & contrast

On white

2.58

#42ACD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.13

#42ACD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42ACD9

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42ACD9	#FFFFFF	#000000	##000000
##42ACD9	1.00	2.58	8.13	8.13
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.13	21.00	1.00	1.00
##000000	8.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95AADB

Deuteranopia (green-blind)

#809BD8

Tritanopia (blue-blind)

#00B8BB

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #42acd9;
/* rgb */ color: rgb(66, 172, 217);
/* oklch */ color: oklch(70.2% 0.116 229.9);

Tailwind

colors: {
  custom: {
    50: '#88c4e5',
    500: '#42acd9',
    950: '#000000',
  },
}

SCSS

$custom: #42acd9;
$custom-light: #88c4e5;
$custom-dark: #000000;

JSON

{
  "hex": "#42acd9",
  "rgb": {
    "r": 66,
    "g": 172,
    "b": 217
  },
  "hsl": {
    "h": 197.881,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.70237,
    "c": 0.11567,
    "h": 229.9
  },
  "luminance": 0.35673
}

Semantic roles & 50–950 ramp

primary

#42ACD9

secondary

#DBAF9C

accent

#713EE9

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1215

muted

#7E8184

Preview Lab

Preview with #42ACD9

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

Preview Lab → · Contrast checker → · Palette generator →