是下拉框按钮背景色，还是下拉框内文字背景色

下拉框内文本背景色：

 $('.fr-trigger-texteditor').css({
                "background-color": "yellow" });

如下JS可选择参考，都有对应的，文本框和按钮要分别设置

setTimeout(function(){

$(".fr-trigger-btn-up").css("box-shadow","0px 0px 18px 0px rgba(0,149,255,0.64)");

$(".fr-trigger-btn-up").css("border","1px solid #7FB1FF");

$(".fr-trigger-btn-up").css("background","rgb(0, 149, 255,0.4)"); 

$(".fr-trigger-btn-over").css("color","#7FB1FF");         //按钮                                                                    

$(".fr-trigger-texteditor").css("box-shadow","0px 0px 18px 0px rgba(0,149,255,0.64)");

$(".fr-trigger-texteditor").css("border","1px solid #7FB1FF");

$(".fr-trigger-texteditor").css("background","rgb(2,71,158)");   

 },100);

setTimeout(function(){

$(".fr-trigger-texteditor").css("color", "white");    //字体颜色

$(".fr-trigger-texteditor").css("font-weight", "bold");  //字体粗细

$(".fr-trigger-texteditor").css("background-color", "#051F62"); //显示值背景色

$(".fr-trigger-btn-up").css("background-color", "#051F62");  //按钮背景色

$(".fr-combo-list").css("background-color", "#051F62");  //按钮背景色

 $(".fr-combo-list").css("background","rgb(38 ,117 ,208)");

},100)

setTimeout(function(){

$(".fr-trigger-editor.ui-state-enabled").css("border-radius","7px");

$(".fr-trigger-btn-up").css("border","1px solid #7FB1FF");

$(".fr-trigger-text.fr-border-box").css("border","1px solid #dceafd");

$(".fr-trigger-btn-up").css("border","1px solid #dceafd");//边框

$(".fr-btn-up.fr-btn-noicon").css("border-radius","7px");

 },100);