#42A5CC#42A5CC

#42A5CC is a light, moderate cyan. Relative luminance 0.324; OKLCH L 68.0% C 0.107 H 227.7°. Best body text is #000000 at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#42A5CC
RGB	rgb(66, 165, 204)
HSL	hsl(197, 58%, 53%)
HSV	hsv(197, 68%, 80%)
CMYK	cmyk(67.6%, 19.1%, 0%, 20%)
CIE-LAB	lab(63.69, -16.46, -28.34)
CIE-LCH	lch(63.69, 32.78, 239.85°)
OKLab	oklab(68.01% -0.0721 -0.0793)
OKLCH	oklch(68.01% 0.107 227.7)
XYZ	xyz(26.5966, 32.4252, 61.9720)
Luminance	0.3243 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A5CC #CC6942

analogous

#42CCAE #42A5CC #4260CC

triadic

#42A5CC #CC42A5 #A5CC42

tetradic

#42A5CC #AE42CC #CC6942 #60CC42

square

#42A5CC #AE42CC #CC6942 #60CC42

split-complementary

#42A5CC #CC4260 #CCAE42

monochromatic

#1F5C74 #2C82A4 #42A5CC #72BCD9 #A2D3E6

Accessibility & contrast

On white

2.81

#42A5CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.49

#42A5CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A5CC

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A5CC	#FFFFFF	#000000	##000000
##42A5CC	1.00	2.81	7.49	7.49
#FFFFFF	2.81	1.00	21.00	21.00
#000000	7.49	21.00	1.00	1.00
##000000	7.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A2CE

Deuteranopia (green-blind)

#7D94CC

Tritanopia (blue-blind)

#00B0B2

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a5cc;
/* rgb */ color: rgb(66, 165, 204);
/* oklch */ color: oklch(68.0% 0.107 227.7);

Tailwind

colors: {
  custom: {
    50: '#86bfdb',
    500: '#42a5cc',
    950: '#000000',
  },
}

SCSS

$custom: #42a5cc;
$custom-light: #86bfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a5cc",
  "rgb": {
    "r": 66,
    "g": 165,
    "b": 204
  },
  "hsl": {
    "h": 196.957,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.68011,
    "c": 0.10723,
    "h": 227.7
  },
  "luminance": 0.32428
}

Semantic roles & 50–950 ramp

primary

#42A5CC

secondary

#D3A897

accent

#7247E1

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A5CC

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

Preview Lab → · Contrast checker → · Palette generator →