#42A5CB#42A5CB

#42A5CB is a light, moderate cyan. Relative luminance 0.324; OKLCH L 68.0% C 0.106 H 227.1°. Best body text is #000000 at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#42A5CB
RGB	rgb(66, 165, 203)
HSL	hsl(197, 57%, 53%)
HSV	hsv(197, 67%, 80%)
CMYK	cmyk(67.5%, 18.7%, 0%, 20.4%)
CIE-LAB	lab(63.65, -16.79, -27.85)
CIE-LCH	lch(63.65, 32.52, 238.92°)
OKLab	oklab(67.97% -0.0725 -0.0779)
OKLCH	oklch(67.97% 0.106 227.1)
XYZ	xyz(26.4771, 32.3774, 61.3424)
Luminance	0.3238 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5CB #CB6842

analogous

#42CBAC #42A5CB #4261CB

triadic

#42A5CB #CB42A5 #A5CB42

tetradic

#42A5CB #AC42CB #CB6842 #61CB42

square

#42A5CB #AC42CB #CB6842 #61CB42

split-complementary

#42A5CB #CB4261 #CBAC42

monochromatic

#205C73 #2D82A3 #42A5CB #72BCD8 #A2D3E5

Accessibility & contrast

On white

2.81

#42A5CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.48

#42A5CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5CB

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5CB	#FFFFFF	#000000	##000000
##42A5CB	1.00	2.81	7.48	7.48
#FFFFFF	2.81	1.00	21.00	21.00
#000000	7.48	21.00	1.00	1.00
##000000	7.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91A2CD

Deuteranopia (green-blind)

#7E94CB

Tritanopia (blue-blind)

#00B0B1

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a5cb;
/* rgb */ color: rgb(66, 165, 203);
/* oklch */ color: oklch(68.0% 0.106 227.1);

Tailwind

colors: {
  custom: {
    50: '#86bfdb',
    500: '#42a5cb',
    950: '#000000',
  },
}

SCSS

$custom: #42a5cb;
$custom-light: #86bfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5cb",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 203
  },
  "hsl": {
    "h": 196.642,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.67967,
    "c": 0.10643,
    "h": 227.1
  },
  "luminance": 0.3238
}

Semantic roles & 50–950 ramp

primary

#42A5CB

secondary

#D2A797

accent

#7248E0

background

#F8FBFD

surface

#F0F7FA

border

#CBD0D3

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A5CB

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

Preview Lab → · Contrast checker → · Palette generator →