Opacity color

.opacity30 {
  opacity: 0.3;
  filter: alpha(opacity=30); /* For IE8 and earlier */
}

Css opacity background color

background: rgba(255, 255, 255, 0.25);

Background color with opacity

h1 {background-color:rgba(255,0,0,0.3);}

Background color opacity

rgba(51, 170, 51, .1)    /*  10% opaque green */ 
rgba(51, 170, 51, .4)    /*  40% opaque green */ 
rgba(51, 170, 51, .7)    /*  70% opaque green */ 
rgba(51, 170, 51,  1)    /* full opaque green */

Source: stackoverflow.com

Similar codes

0 vote195 views1 answer
Corsair css
CSS
8 votes197 views1 answer
How to align items in css
CSS
27 votes206 views3 answers
Align div to center of screen
CSS
0 vote191 views1 answer
Img grows up onmouseover css
CSS
0 vote204 views1 answer
Css style nth child beyond certain number
CSS
0 vote198 views1 answer
Change size
CSS
1 vote296 views3 answers
Bootstrap table text vertical align center
CSS Bootstrap
0 vote194 views1 answer
See css from site
CSS
1 vote188 views1 answer
Css prevent margin collapsing
CSS
0 vote203 views1 answer
Add css to class=["col-"]
CSS