#42b0df
a balanced, vivid cyan · cool · closest name: skyblue
RGB
66, 176, 223
HSL
198°, 71%, 57%
CMYK
70, 21, 0, 13
Luminance
0.3754
Every format
| HEX | #42b0df |
| RGB | rgb(66, 176, 223) |
| HSL | hsl(198, 71%, 57%) |
| CMYK | cmyk(70%, 21%, 0%, 13%) |
| LAB | lab(67.7 -16.2 -32.7) |
| LCH | lch(67.7 36.5 243.7) |
| OKLCH | oklch(0.714 0.119 230.3) |
Copy-ready code
/* CSS */
color: #42b0df;
background-color: #42b0df;
/* Tailwind (arbitrary) */
class="text-[#42b0df] bg-[#42b0df]"
/* SCSS */
$brand: #42b0df;
/* SwiftUI */
Color(red: 0.259, green: 0.690, blue: 0.875)
/* Android */
Color.parseColor("#42b0df")Accessibility — WCAG contrast
Aa
#42b0df on white: 2.47:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#42b0df on black: 8.51:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green69.0%
Blue87.5%
CMYK percentages
Cyan70.4%
Magenta21.1%
Yellow0.0%
Key (black)12.5%
Color previews
#42b0df text on a black background
contrast 8.51:1
Card sample
#42b0df text on a white background
contrast 2.47:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #42b0df;
Background color
Panel with #42b0df background
background-color: #42b0df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #42b0df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 176, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 176, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #42b0df; background: linear-gradient(135deg, #42b0df, #4247DF);