修改element-ui日期下拉框datetimePicker的背景色样式

如图：

1、修改背景色

.el-date-picker.has-sidebar.has-time {

background: #04308D;

color: #fff;

border: 1px solid #326AFF

}

.el-date-picker__header-label {

color: #ffffff;

}

.el-date-table th {

color: #fff;

}

.el-icon-d-arrow-left:before {

color: #fff;

}

.el-icon-arrow-left:before {

color: #fff;

}

.el-icon-arrow-right:before {

color: #fff;

}

.el-icon-d-arrow-right:before {

color: #fff;

}

.el-picker-panel__footer {

background-color: #04308D;

border: 1px solid #326AFF

}

.el-picker-panel [slot=sidebar], .el-picker-panel__sidebar {

background-color: #04308D;

border-right: 1px solid #326AFF;

}

.el-picker-panel__shortcut {

color: #fff;

}

.el-date-picker__time-header {

border-bottom: 1px solid #326AFF;

}

.el-popper[x-placement^=bottom] .popper__arrow::after {

top: 1px;

margin-left: -6px;

border-top-width: 0;

border-bottom-color: #04308D;

}

.el-popper[x-placement^=top] .popper__arrow::after {

bottom: 1px;

margin-left: -6px;

border-top-color: #326AFF;

border-bottom-width: 0;

}

.el-picker-panel {

background: #04308D;

color: #fff;

}

.el-date-table td.in-range div, .el-date-table td.in-range div:hover, .el-date-table.is-week-mode .el-date-table__row.current div, .el-date-table.is-week-mode .el-date-table__row:hover div {

background-color: #326AFFc9;

}

.el-date-range-picker__time-header{

border-bottom: 1px solid #326AFF;

}

.el-date-range-picker__content.is-left{

border-right: 1px solid #326AFF;

}

2、修改输入框

.el-input__wrapper {

border: 1px solid #326AFF;

box-shadow: 0 0 0 0px #326AFF inset;

background: #04308D !important;

}

.el-input__wrapper .el-input__inner {

background: #04308D !important;

font-size: 14px;

font-weight: 400;

color: #FFFFFF;

}

3、修改三角号的背景色和边框

.el-popper.is-light .el-popper__arrow::before {

border: 1px solid #326AFF;

background: #04308D;

right: 0;

}

.el-popper.is-pure {

border: 1px solid #326AFF;

}

4、修改下一天下一年按钮颜色

.el-picker-panel__icon-btn{

color: #fff;

}

5、修改选中日期的字体颜色

.in-range{

color: #326aff;

}

6、最下面按钮

.el-picker-panel__footer .el-button.is-text {

color: #fff;

border: 0 solid transparent;

background-color: transparent;

}

.el-picker-panel__footer .el-button{

background-color: #326aff;

border: 1px solid #326AFF;

color: #fff;

}

.el-button.is-text:not(.is-disabled):hover {

background-color: #326aff;

}

7、全部代码

.el-date-picker.has-sidebar.has-time {
    background: #04308D;
    color: #fff;
    border: 1px solid #326AFF
}
.el-date-picker__header-label {
    color: #ffffff;
}
.el-date-table th {
    color: #fff;
}
.el-icon-d-arrow-left:before {
    color: #fff;
}
.el-icon-arrow-left:before {
    color: #fff;
}
.el-icon-arrow-right:before {
    color: #fff;
}
.el-icon-d-arrow-right:before {
    color: #fff;
}
.el-picker-panel__footer {
    background-color: #04308D;
    border: 1px solid #326AFF
}
.el-picker-panel [slot=sidebar], .el-picker-panel__sidebar {
    background-color: #04308D;
    border-right: 1px solid #326AFF;
}
.el-picker-panel__shortcut {
    color: #fff;
}
.el-date-picker__time-header {
    border-bottom: 1px solid #326AFF;
}
.el-popper[x-placement^=bottom] .popper__arrow::after {
    top: 1px;
    margin-left: -6px;
    border-top-width: 0;
    border-bottom-color: #04308D;
}
.el-popper[x-placement^=top] .popper__arrow::after {
    bottom: 1px;
    margin-left: -6px;
    border-top-color: #326AFF;
    border-bottom-width: 0;
}
.el-picker-panel {
    background: #04308D;
    color: #fff;
}
.el-date-table td.in-range div, .el-date-table td.in-range div:hover, .el-date-table.is-week-mode .el-date-table__row.current div, .el-date-table.is-week-mode .el-date-table__row:hover div {
    background-color: #326AFFc9;
}
.el-date-range-picker__time-header{
    border-bottom: 1px solid #326AFF;
}
.el-date-range-picker__content.is-left{
    border-right: 1px solid #326AFF;
}
//三角号
.el-popper.is-light .el-popper__arrow::before {
    border: 1px solid #326AFF;
    background: #04308D;
    right: 0;
}
.el-popper.is-pure {
    border:  1px solid #326AFF;
}
.el-input__wrapper {
    border: 1px solid #326AFF;
    box-shadow: 0 0 0 0px #326AFF inset;
    background: #04308D !important;

}

.el-input__wrapper .el-input__inner {
    background: #04308D !important;
    font-size: 14px;
    font-weight: 400;
    color: #FFFFFF;
}
// 下方按钮
.el-picker-panel__footer .el-button.is-text {
    color: #fff;
    border: 0 solid transparent;
    background-color: transparent;
}
.el-picker-panel__footer .el-button{
    background-color: #326aff;
    border: 1px solid #326AFF;
    color: #fff;
}
.el-button.is-text:not(.is-disabled):hover {
    background-color: #326aff;
}
.in-range{
    color: #326aff;

}

放到assets里面间一个scss文件