#42B9D8#42B9D8

#42B9D8 is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.2% C 0.112 H 218.7°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#42B9D8
RGB	rgb(66, 185, 216)
HSL	hsl(192, 66%, 55%)
HSV	hsv(192, 69%, 85%)
CMYK	cmyk(69.4%, 14.4%, 0%, 15.3%)
CIE-LAB	lab(70.04, -23.09, -25.20)
CIE-LCH	lch(70.04, 34.18, 227.50°)
OKLab	oklab(73.25% -0.0877 -0.0703)
OKLCH	oklch(73.25% 0.112 218.7)
XYZ	xyz(31.9853, 40.8104, 71.1439)
Luminance	0.4081 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B9D8 #D86142

analogous

#42D8AC #42B9D8 #426ED8

triadic

#42B9D8 #D842B9 #B9D842

tetradic

#42B9D8 #AC42D8 #D86142 #6ED842

square

#42B9D8 #AC42D8 #D86142 #6ED842

split-complementary

#42B9D8 #D8426E #D8AC42

monochromatic

#1B6F84 #2699B7 #42B9D8 #75CCE2 #A7DFED

Accessibility & contrast

On white

2.29

#42B9D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.16

#42B9D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B9D8

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B9D8	#FFFFFF	#000000	##000000
##42B9D8	1.00	2.29	9.16	9.16
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.16	21.00	1.00	1.00
##000000	9.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B4DA

Deuteranopia (green-blind)

#90A5D8

Tritanopia (blue-blind)

#00C3C3

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #42b9d8;
/* rgb */ color: rgb(66, 185, 216);
/* oklch */ color: oklch(73.2% 0.112 218.7);

Tailwind

colors: {
  custom: {
    50: '#89cee4',
    500: '#42b9d8',
    950: '#000000',
  },
}

SCSS

$custom: #42b9d8;
$custom-light: #89cee4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b9d8",
  "rgb": {
    "r": 66,
    "g": 185,
    "b": 216
  },
  "hsl": {
    "h": 192.4,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.73248,
    "c": 0.11238,
    "h": 218.7
  },
  "luminance": 0.40814
}

Semantic roles & 50–950 ramp

primary

#42B9D8

secondary

#DAA99C

accent

#623FE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B9D8

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

Preview Lab → · Contrast checker → · Palette generator →