#42A3CF#42A3CF

#42A3CF is a light, moderate cyan. Relative luminance 0.319; OKLCH L 67.7% C 0.110 H 231.3°. Best body text is #000000 at 7.37:1 contrast (WCAG AA passes).

Color values

HEX	#42A3CF
RGB	rgb(66, 163, 207)
HSL	hsl(199, 59%, 54%)
HSV	hsv(199, 68%, 81%)
CMYK	cmyk(68.1%, 21.3%, 0%, 18.8%)
CIE-LAB	lab(63.22, -14.42, -30.74)
CIE-LCH	lch(63.22, 33.95, 244.87°)
OKLab	oklab(67.68% -0.069 -0.0862)
OKLCH	oklch(67.68% 0.11 231.3)
XYZ	xyz(26.6020, 31.8547, 63.7660)
Luminance	0.3186 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3CF #CF6E42

analogous

#42CFB4 #42A3CF #425CCF

triadic

#42A3CF #CF42A3 #A3CF42

tetradic

#42A3CF #B442CF #CF6E42 #5CCF42

square

#42A3CF #B442CF #CF6E42 #5CCF42

split-complementary

#42A3CF #CF425C #CFB442

monochromatic

#1F5C78 #2B82A9 #42A3CF #73BBDB #A4D3E8

Accessibility & contrast

On white

2.85

#42A3CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.37

#42A3CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3CF

7.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3CF	#FFFFFF	#000000	##000000
##42A3CF	1.00	2.85	7.37	7.37
#FFFFFF	2.85	1.00	21.00	21.00
#000000	7.37	21.00	1.00	1.00
##000000	7.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DA1D1

Deuteranopia (green-blind)

#7A93CE

Tritanopia (blue-blind)

#00AFB2

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a3cf;
/* rgb */ color: rgb(66, 163, 207);
/* oklch */ color: oklch(67.7% 0.110 231.3);

Tailwind

colors: {
  custom: {
    50: '#86bedd',
    500: '#42a3cf',
    950: '#000000',
  },
}

SCSS

$custom: #42a3cf;
$custom-light: #86bedd;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3cf",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 207
  },
  "hsl": {
    "h": 198.723,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.67676,
    "c": 0.11044,
    "h": 231.3
  },
  "luminance": 0.31858
}

Semantic roles & 50–950 ramp

primary

#42A3CF

secondary

#D5AB98

accent

#7645E3

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A3CF

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

Preview Lab → · Contrast checker → · Palette generator →