el-radio样式：

/deep/ .el-radio__input .el-radio__inner {width: 20px;height: 20px;position: relative;cursor: pointer;-webkit-appearance: none;-moz-appearance: none;appearance: none;border: 1px solid #999;border-radius: 0;outline: none;transition: all 0.3s ease-in-out;box-sizing: border-box;cursor: pointer;
}/* 选中后的字体颜色 */
/deep/ .el-radio__input.is-checked+.el-radio__label {color: #7e6934 !important;
}/* 选中后圆圈的背景颜色 */
/deep/ .el-radio__input.is-checked .el-radio__inner {background: #7e6934 !important;border-color: #7e6934 !important;
}// 选中后的样式
/deep/ .el-radio__input.is-checked .el-radio__inner::after {width: 20px;height: 20px;display: inline-block;visibility: visible;padding-left: 0;text-align: center;content: "✓";color: #fff;font-size: 10px;line-height: 20px;border-radius: 0;background-color: #88733c;
}

el-input:改变选中时的边框颜色

/deep/.el-input__inner:focus {border-color: #88733c
}

el-select：改变选中时的边框、文本颜色

// 选择框选中时的边框颜色
/deep/.el-select .el-input.is-focus .el-input__inner {border-color: #88733c !important;
}//选择框选中又取消时的边框颜色
/deep/.el-select .el-input__inner:focus {border-color: #88733c !important;
}// 选择框选中的文本颜色
.el-select-dropdown__item.selected {color: #88733c;
}

设置下拉选择框未选中时的提示文字

<el-select placeholder="月份*"></el-select>