CSS3 Transparency + Gradient
CssGradientCss Problem Overview
RGBA is extremely fun, and so is -webkit-gradient, -moz-gradient, and uh... progid:DXImageTransform.Microsoft.gradient... yeah. :)
Is there a way to combine the two, RGBA and gradients, so that there's gradient of alpha transparency using the current/latest CSS specs.
Css Solutions
Solution 1 - Css
Yes. You can use rgba in both webkit and moz gradient declarations:
/* webkit example */
background-image: -webkit-gradient(
linear, left top, left bottom, from(rgba(50,50,50,0.8)),
to(rgba(80,80,80,0.2)), color-stop(.5,#333333)
);
(http://www.sanbeiji.com/archives/1002">src</a>;)
/* mozilla example - FF3.6+ */
background-image: -moz-linear-gradient(
rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0) 95%
);
(http://girliemac.com/blog/2010/01/28/css3-aqua-button-revisited-for-firefox-3-6/">src</a>;)
Apparently you can even do this in IE, using an odd "extended hex" syntax. The first pair (in the example 55) refers to the level of opacity:
/* approximately a 33% opacity on blue */
filter: progid:DXImageTransform.Microsoft.gradient(
startColorstr=#550000FF, endColorstr=#550000FF
);
/* IE8 uses -ms-filter for whatever reason... */
-ms-filter: progid:DXImageTransform.Microsoft.gradient(
startColorstr=#550000FF, endColorstr=#550000FF
);
(http://leaverou.me/2009/02/bulletproof-cross-browser-rgba-backgrounds/">src</a>;)
Solution 2 - Css
New syntax has been supported for a while by all modern browsers (starting from Chrome 26, Opera 12.1, IE 10 and Firefox 16): http://caniuse.com/#feat=css-gradients
background: linear-gradient(to bottom, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0));
This renders a gradient, starting from solid black at the top, to fully transparent at the bottom.
Solution 3 - Css
This is some really cool stuff! I needed pretty much the same, but with horizontal gradient from white to transparent. And it is working just fine! Here ist my code:
.gradient{
/* webkit example */
background-image: -webkit-gradient(
linear, right top, left top, from(rgba(255, 255, 255, 1.0)),
to(rgba(255, 255, 255, 0))
);
/* mozilla example - FF3.6+ */
background-image: -moz-linear-gradient(
right center,
rgba(255, 255, 255, 1.0) 20%, rgba(255, 255, 255, 0) 95%
);
/* IE 5.5 - 7 */
filter: progid:DXImageTransform.Microsoft.gradient(
gradientType=1, startColor=0, endColorStr=#FFFFFF
);
/* IE8 uses -ms-filter for whatever reason... */
-ms-filter: progid:DXImageTransform.Microsoft.gradient(
gradientType=1, startColor=0, endColoStr=#FFFFFF
);
}
Solution 4 - Css
Here is my code:
background: #e8e3e3; /* Old browsers */
background: -moz-linear-gradient(top, rgba(232, 227, 227, 0.95) 0%, rgba(246, 242, 242, 0.95) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(232, 227, 227, 0.95)), color-stop(100%,rgba(246, 242, 242, 0.95))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(232, 227, 227, 0.95) 0%,rgba(246, 242, 242, 0.95) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(232, 227, 227, 0.95) 0%,rgba(246, 242, 242, 0.95) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(232, 227, 227, 0.95) 0%,rgba(246, 242, 242, 0.95) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(232, 227, 227, 0.95) 0%,rgba(246, 242, 242, 0.95) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='rgba(232, 227, 227, 0.95)', endColorstr='rgba(246, 242, 242, 0.95)',GradientType=0 ); /* IE6-9 */
Solution 5 - Css
#grad
{
background: -webkit-linear-gradient(left,rgba(255,0,0,0),rgba(255,0,0,1)); /*Safari 5.1-6*/
background: -o-linear-gradient(right,rgba(255,0,0,0),rgba(255,0,0,1)); /*Opera 11.1-12*/
background: -moz-linear-gradient(right,rgba(255,0,0,0),rgba(255,0,0,1)); /*Fx 3.6-15*/
background: linear-gradient(to right, rgba(255,0,0,0), rgba(255,0,0,1)); /*Standard*/
}
I found this in w3schools and suited my needs while I was looking for gradient and transparency. I am providing the link to refer to w3schools. Hope this helps if any one is looking for gradient and transparency.
http://www.w3schools.com/css/css3_gradients.asp
Also I tried it in w3schools to change the opacity pasting the link for it check it
http://www.w3schools.com/css/tryit.asp?filename=trycss3_gradient-linear_trans
Hope it helps.
Solution 6 - Css
The following is the one that I'm using to generate a vertical gradient from completely opaque (top) to 20% in transparency (bottom) for the same color:
background: linear-gradient(to bottom, rgba(0, 64, 122, 1) 0%,rgba(0, 64, 122, 0.8) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
background: -o-linear-gradient(top, rgba(0, 64, 122, 1) 0%, rgba(0, 64, 122, 0.8) 100%); /* Opera 11.10+ */
background: -moz-linear-gradient(top, rgba(0, 64, 122, 1) 0%, rgba(0, 64, 122, 0.8) 100%); /* FF3.6-15 */
background: -webkit-linear-gradient(top, rgba(0, 64, 122, 1) 0%,rgba(0, 64, 122, 0.8) 100%); /* Chrome10-25,Safari5.1-6 */
background: -ms-linear-gradient(top, rgba(0, 64, 122, 1) 0%,rgba(0, 64, 122, 0.8) 100%); /* IE10+ */
-ms-filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00407a', endColorstr='#cc00407a',GradientType=0 ); /* IE8 */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00407a', endColorstr='#cc00407a',GradientType=0 ); /* IE 5.5 - 9 */
Solution 7 - Css
I just came across this more recent example . To simplify and use the most recent examples, giving the css a selector class of 'grad',(I've included backwards compatibility)
.grad {
background-color: #F07575; /* fallback color if gradients are not supported */
background-image: -webkit-linear-gradient(top left, red, rgba(255,0,0,0));/* For Chrome 25 and Safari 6, iOS 6.1, Android 4.3 */
background-image: -moz-linear-gradient(top left, red, rgba(255,0,0,0));/* For Firefox (3.6 to 15) */
background-image: -o-linear-gradient(top left, red, rgba(255,0,0,0));/* For old Opera (11.1 to 12.0) */
background-image: linear-gradient(to bottom right, red, rgba(255,0,0,0)); /* Standard syntax; must be last */
}
from https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient