值错误：背景图像底部不是颜色值）

Question

Can Some one can Help me to Rectify this Issue., I am Getting The Error as :Value Error : background-image bottom is not a color value )

.btn {
    padding:5px 10px; border-radius:5px; color:#FFF; text-shadow: 1px 1px #333;
    box-shadow: inset 0 1px 0 0 #94bee0; border: none;
    background-image: linear-gradient(bottom, rgb(42,112,166) 21%, rgb(66,136,190) 61%);
    background-image: -o-linear-gradient(bottom, rgb(42,112,166) 21%, rgb(66,136,190) 61%);
    background-image: -moz-linear-gradient(bottom, rgb(42,112,166) 21%, rgb(66,136,190) 61%);
    background-image: -webkit-linear-gradient(bottom, rgb(42,112,166) 21%, rgb(66,136,190) 61%);
    background-image: -ms-linear-gradient(bottom, rgb(42,112,166) 21%, rgb(66,136,190) 61%);

    background-image: -webkit-gradient(
        linear,
        left bottom,
        left top,
        color-stop(0.21, rgb(42,112,166)),
        color-stop(0.61, rgb(66,136,190))
    );
}

Answer 1

Your unprefixed linear-gradient() syntax needs to be updated to match the latest spec , which has a different syntax for specifying the direction:

background-image: linear-gradient(to top, rgb(42,112,166) 21%, rgb(66,136,190) 61%);

Note that to top does in fact replace bottom , even though it's the opposite direction. See this answer for an explanation.

As for the prefixed values, don't worry about them: they are non-standard and therefore cannot be validated.