#42A8CF#42A8CF

#42A8CF is a light, moderate cyan. Relative luminance 0.337; OKLCH L 68.9% C 0.109 H 227.1°. Best body text is #000000 at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#42A8CF
RGB	rgb(66, 168, 207)
HSL	hsl(197, 59%, 54%)
HSV	hsv(197, 68%, 81%)
CMYK	cmyk(68.1%, 18.8%, 0%, 18.8%)
CIE-LAB	lab(64.70, -17.10, -28.46)
CIE-LCH	lch(64.70, 33.20, 239.00°)
OKLab	oklab(68.85% -0.0741 -0.0796)
OKLCH	oklch(68.85% 0.109 227.1)
XYZ	xyz(27.5074, 33.6655, 64.0678)
Luminance	0.3367 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A8CF #CF6942

analogous

#42CFB0 #42A8CF #4261CF

triadic

#42A8CF #CF42A8 #A8CF42

tetradic

#42A8CF #B042CF #CF6942 #61CF42

square

#42A8CF #B042CF #CF6942 #61CF42

split-complementary

#42A8CF #CF4261 #CFB042

monochromatic

#1F5F78 #2B86A9 #42A8CF #73BEDB #A4D5E8

Accessibility & contrast

On white

2.72

#42A8CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.73

#42A8CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A8CF

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A8CF	#FFFFFF	#000000	##000000
##42A8CF	1.00	2.72	7.73	7.73
#FFFFFF	2.72	1.00	21.00	21.00
#000000	7.73	21.00	1.00	1.00
##000000	7.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#93A5D1

Deuteranopia (green-blind)

#8097CF

Tritanopia (blue-blind)

#00B3B5

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #42a8cf;
/* rgb */ color: rgb(66, 168, 207);
/* oklch */ color: oklch(68.9% 0.109 227.1);

Tailwind

colors: {
  custom: {
    50: '#87c2dd',
    500: '#42a8cf',
    950: '#000000',
  },
}

SCSS

$custom: #42a8cf;
$custom-light: #87c2dd;
$custom-dark: #000000;

JSON

{
  "hex": "#42a8cf",
  "rgb": {
    "r": 66,
    "g": 168,
    "b": 207
  },
  "hsl": {
    "h": 196.596,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.68852,
    "c": 0.10877,
    "h": 227.1
  },
  "luminance": 0.33669
}

Semantic roles & 50–950 ramp

primary

#42A8CF

secondary

#D5A998

accent

#7145E3

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0D1215

muted

#7D8183

Preview Lab

Preview with #42A8CF

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

Preview Lab → · Contrast checker → · Palette generator →