#42A4CF#42A4CF

#42A4CF is a light, moderate cyan. Relative luminance 0.322; OKLCH L 67.9% C 0.110 H 230.5°. Best body text is #000000 at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#42A4CF
RGB	rgb(66, 164, 207)
HSL	hsl(198, 59%, 54%)
HSV	hsv(198, 68%, 81%)
CMYK	cmyk(68.1%, 20.8%, 0%, 18.8%)
CIE-LAB	lab(63.52, -14.96, -30.28)
CIE-LCH	lch(63.52, 33.78, 243.72°)
OKLab	oklab(67.91% -0.07 -0.0849)
OKLCH	oklch(67.91% 0.11 230.5)
XYZ	xyz(26.7802, 32.2112, 63.8254)
Luminance	0.3221 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A4CF #CF6D42

analogous

#42CFB3 #42A4CF #425DCF

triadic

#42A4CF #CF42A4 #A4CF42

tetradic

#42A4CF #B342CF #CF6D42 #5DCF42

square

#42A4CF #B342CF #CF6D42 #5DCF42

split-complementary

#42A4CF #CF425D #CFB342

monochromatic

#1F5D78 #2B82A9 #42A4CF #73BBDB #A4D3E8

Accessibility & contrast

On white

2.82

#42A4CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.44

#42A4CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A4CF

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A4CF	#FFFFFF	#000000	##000000
##42A4CF	1.00	2.82	7.44	7.44
#FFFFFF	2.82	1.00	21.00	21.00
#000000	7.44	21.00	1.00	1.00
##000000	7.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8EA2D1

Deuteranopia (green-blind)

#7B94CE

Tritanopia (blue-blind)

#00B0B2

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a4cf;
/* rgb */ color: rgb(66, 164, 207);
/* oklch */ color: oklch(67.9% 0.110 230.5);

Tailwind

colors: {
  custom: {
    50: '#86bfdd',
    500: '#42a4cf',
    950: '#000000',
  },
}

SCSS

$custom: #42a4cf;
$custom-light: #86bfdd;
$custom-dark: #000000;

JSON

{
  "hex": "#42a4cf",
  "rgb": {
    "r": 66,
    "g": 164,
    "b": 207
  },
  "hsl": {
    "h": 198.298,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.6791,
    "c": 0.11005,
    "h": 230.5
  },
  "luminance": 0.32214
}

Semantic roles & 50–950 ramp

primary

#42A4CF

secondary

#D5AB98

accent

#7545E3

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A4CF

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

Preview Lab → · Contrast checker → · Palette generator →