#42A3CC#42A3CC

#42A3CC is a light, moderate cyan. Relative luminance 0.317; OKLCH L 67.5% C 0.108 H 229.5°. Best body text is #000000 at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#42A3CC
RGB	rgb(66, 163, 204)
HSL	hsl(198, 58%, 53%)
HSV	hsv(198, 68%, 80%)
CMYK	cmyk(67.6%, 20.1%, 0%, 20%)
CIE-LAB	lab(63.10, -15.39, -29.26)
CIE-LCH	lch(63.10, 33.06, 242.25°)
OKLab	oklab(67.54% -0.0701 -0.0819)
OKLCH	oklch(67.54% 0.108 229.5)
XYZ	xyz(26.2387, 31.7094, 61.8527)
Luminance	0.3171 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A3CC #CC6B42

analogous

#42CCB0 #42A3CC #425ECC

triadic

#42A3CC #CC42A3 #A3CC42

tetradic

#42A3CC #B042CC #CC6B42 #5ECC42

square

#42A3CC #B042CC #CC6B42 #5ECC42

split-complementary

#42A3CC #CC425E #CCB042

monochromatic

#1F5B74 #2C81A4 #42A3CC #72BAD9 #A2D2E6

Accessibility & contrast

On white

2.86

#42A3CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.34

#42A3CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A3CC

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A3CC	#FFFFFF	#000000	##000000
##42A3CC	1.00	2.86	7.34	7.34
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.34	21.00	1.00	1.00
##000000	7.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8EA1CE

Deuteranopia (green-blind)

#7B93CB

Tritanopia (blue-blind)

#00AEB1

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a3cc;
/* rgb */ color: rgb(66, 163, 204);
/* oklch */ color: oklch(67.5% 0.108 229.5);

Tailwind

colors: {
  custom: {
    50: '#86bedb',
    500: '#42a3cc',
    950: '#000000',
  },
}

SCSS

$custom: #42a3cc;
$custom-light: #86bedb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a3cc",
  "rgb": {
    "r": 66,
    "g": 163,
    "b": 204
  },
  "hsl": {
    "h": 197.826,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.6754,
    "c": 0.10785,
    "h": 229.5
  },
  "luminance": 0.31712
}

Semantic roles & 50–950 ramp

primary

#42A3CC

secondary

#D3A997

accent

#7547E1

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A3CC

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

Preview Lab → · Contrast checker → · Palette generator →