#42B5D8#42B5D8

#42B5D8 is a light, moderate cyan. Relative luminance 0.392; OKLCH L 72.3% C 0.113 H 222.0°. Best body text is #000000 at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#42B5D8
RGB	rgb(66, 181, 216)
HSL	hsl(194, 66%, 55%)
HSV	hsv(194, 69%, 85%)
CMYK	cmyk(69.4%, 16.2%, 0%, 15.3%)
CIE-LAB	lab(68.87, -21.04, -27.00)
CIE-LCH	lch(68.87, 34.23, 232.07°)
OKLab	oklab(72.3% -0.0837 -0.0754)
OKLCH	oklch(72.3% 0.113 222)
XYZ	xyz(31.1602, 39.1603, 70.8689)
Luminance	0.3916 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B5D8 #D86542

analogous

#42D8B0 #42B5D8 #426AD8

triadic

#42B5D8 #D842B5 #B5D842

tetradic

#42B5D8 #B042D8 #D86542 #6AD842

square

#42B5D8 #B042D8 #D86542 #6AD842

split-complementary

#42B5D8 #D8426A #D8B042

monochromatic

#1B6C84 #2695B7 #42B5D8 #75C9E2 #A7DDED

Accessibility & contrast

On white

2.38

#42B5D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.83

#42B5D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B5D8

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B5D8	#FFFFFF	#000000	##000000
##42B5D8	1.00	2.38	8.83	8.83
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.83	21.00	1.00	1.00
##000000	8.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B1DA

Deuteranopia (green-blind)

#8CA1D8

Tritanopia (blue-blind)

#00C0C0

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #42b5d8;
/* rgb */ color: rgb(66, 181, 216);
/* oklch */ color: oklch(72.3% 0.113 222.0);

Tailwind

colors: {
  custom: {
    50: '#89cbe4',
    500: '#42b5d8',
    950: '#000000',
  },
}

SCSS

$custom: #42b5d8;
$custom-light: #89cbe4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b5d8",
  "rgb": {
    "r": 66,
    "g": 181,
    "b": 216
  },
  "hsl": {
    "h": 194,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.72305,
    "c": 0.1127,
    "h": 222
  },
  "luminance": 0.39164
}

Semantic roles & 50–950 ramp

primary

#42B5D8

secondary

#DAAA9C

accent

#673FE9

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B5D8

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

Preview Lab → · Contrast checker → · Palette generator →