setTimeout(function(){

$(".bi-text").css("background-color", "red");

$(".bi-date-trigger").css("background-color", "red");

},100)

---------------------------------------------------

移动端试试这个

$('.fr-trigger-btn-up').css('background','#2E8377');这个是日期框右边的那个颜色

$('.fr-trigger-btn-up').css('border-radius','3px');这个是日期框右边的圆角

$('.fr-trigger-text.fr-border-box').css('border-radius','3px');日期框的圆角

$('.fr-trigger-text.fr-border-box').css('border','1px solid #74e164')日期框的线和颜色

$('.fr-trigger-texteditor').css('color','#E91E63')日期框里面字体的颜色

$('.fr-trigger-texteditor').css('color','#673AB7')

-----------------------------复制大佬的---------------------

11版本日期控件背景色

添加初始化后事件

setTimeout(function() { 

$(".bi-card").css({"background":"transparent"});//日历背景

$(".bi-border").css({'border':'none'});//边框

$(".bi-text").css({"color":"#fff"} );//文本颜色

$(".bi-card").css({"color":"#fff"});//日历颜色

},100)

11版本日期控件下拉表颜色(body或者para的点击事件)

setTimeout(function() {

$(".bi-v.list-view-outer.bi-card.list-view-shadow").css({"background":"linear-gradient(180deg,rgba(0,145,255,0.049)0%,rgba(0,26,56,0.098)100%)","color":"white","font-size":'12px',"text-align":"center"});//下拉列表背景，字体颜色大小

}, 10)