样式1

background-image: linear-gradient(160deg, #b100ff 20%,#00b3ff 80%);

样式2

background-image: linear-gradient(160deg, #ff0064 20%,#ca00ff 80%);

样式3

background-image: linear-gradient(160deg, #0078ff 20%,#002abb 80%);

样式4

background-image: linear-gradient(160deg, #00ffd5 20%,#008cff 80%);

样式5

background-image: linear-gradient(160deg, #ffce00 20%,#ff8b00 80%);

样式6

background-image: linear-gradient(160deg, #a200ff 20%,#cf3700 80%);

转载自: http://www.n-bros.net/note/front_end/css/archives/4020/