Bootstrap按钮颜色因此在variables.less中定义：
@btnPrimaryBackground: @linkColor;
@btnPrimaryBackgroundHighlight: spin(@btnPrimaryBackground, 20%);
@btnInfoBackground: #5bc0de;
@btnInfoBackgroundHighlight: #2f96b4;
@btnSuccessBackground: #62c462;
@btnSuccessBackgroundHighlight: #51a351;
@btnWarningBackground: lighten(@orange, 15%);
@btnWarningBackgroundHighlight: @orange;
@btnDangerBackground: #ee5f5b;
@btnDangerBackgroundHighlight: #bd362f;
@btnInverseBackground: #444;
@btnInverseBackgroundHighlight: @grayDarker;
background 和 backgroundHighlight 的十六进制代码中是否存在某些逻辑（即十六进制代码之间的特定颜色差异），或者是否根据某人的设计角度进行了设置他们看起来很好看？
答案 0 :(得分：1)
你可以看到它是专门设计的。但是你可以使用5％或10％值的lighten（）或darken（）mixins来设置高光。但是你也可以用一种颜色制作整个按钮：）
答案 1 :(得分：1)
我从Bootstrap的源代码中获取了相关的LESS代码，以生成btn-purple类。渐变等与默认按钮非常相似。您只需在下面的LESS代码中更改@backgroundColor和@backgroundColorHighlight即可更改颜色。
// Gradient Bar Colors for buttons and alerts
.gradientBar(@primaryColor, @secondaryColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
color: @textColor;
text-shadow: @textShadow;
#gradient > .vertical(@primaryColor, @secondaryColor);
border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
}
// Gradients
#gradient {
.horizontal(@startColor: #555, @endColor: #333) {
background-color: @endColor;
background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(to right, @startColor, @endColor); // Standard, IE10
background-repeat: repeat-x;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@startColor),argb(@endColor))); // IE9 and down
}
.vertical(@startColor: #555, @endColor: #333) {
background-color: mix(@startColor, @endColor, 60%);
background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(to bottom, @startColor, @endColor); // Standard, IE10
background-repeat: repeat-x;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down
}
.directional(@startColor: #555, @endColor: #333, @deg: 45deg) {
background-color: @endColor;
background-repeat: repeat-x;
background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
background-image: linear-gradient(@deg, @startColor, @endColor); // Standard, IE10
}
.horizontal-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
background-color: mix(@midColor, @endColor, 80%);
background-image: -webkit-gradient(left, linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
background-image: -webkit-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
background-image: -moz-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
background-image: -o-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
background-image: linear-gradient(to right, @startColor, @midColor @colorStop, @endColor);
background-repeat: no-repeat;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
}
.vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
background-color: mix(@midColor, @endColor, 80%);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
background-repeat: no-repeat;
filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
}
.radial(@innerColor: #555, @outerColor: #333) {
background-color: @outerColor;
background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
background-repeat: no-repeat;
}
.striped(@color: #555, @angle: 45deg) {
background-color: @color;
background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255,255,255,.15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255,255,255,.15)), color-stop(.75, rgba(255,255,255,.15)), color-stop(.75, transparent), to(transparent));
background-image: -webkit-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: -moz-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: -o-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
background-image: linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
}
}
// Reset filters for IE
.reset-filter() {
filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
}
.buttonBackground(@startColor, @endColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
// gradientBar will set the background to a pleasing blend of these, to support IE<=9
.gradientBar(@startColor, @endColor, @textColor, @textShadow);
*background-color: @endColor; /* Darken IE7 buttons by default so they stand out more given they won't have borders */
.reset-filter();
// in these cases the gradient won't cover the background, so we override
&:hover, &:focus, &:active, &.active, &.disabled, &[disabled] {
color: @textColor;
background-color: @endColor;
*background-color: darken(@endColor, 5%);
background-position: 0 -15px;
}
// IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
&:active,
&.active {
background-color: darken(@endColor, 10%) e("\9");
}
}
// Provide *some* extra contrast for those who can get it
.btn-purple.active {
color: rgba(255,255,255,.75);
}
// Set the backgrounds
// -------------------------
@backgroundColor: lighten(#7a43b6, 10%);
@backgroundColorHighlight: darken(#7a43b6, 5%);
.btn-purple {
.buttonBackground(@backgroundColor, @backgroundColorHighlight);
}