I've recently added a fifth color to the markers in my maptour. The markers look fine, but the the background color behind the number of the thumbnail photos in the carousel aren't showing for the new colour, orange. I went in to maptour-config.css and changed what I think this thread was suggesting.
you can change the font-color in the carousel for each class in the maptour-min.css.
For example to change the font color for class 1, add:
#organizePopup .number-class1{background-color:#003d00;color:#YOURCOLORHERE}
I have a link to my repo here, hopefully someone can take a look? my maptour repo
Snippet of what I changed here
.numberLabel{background-color:red;width:20px;height:20px;position:absolute;top:5px;left:5px;text-align:center;color:#fff}#organizePopup .number-blue{background-color:#1880f3}#organizePopup .number-red{background-color:red}#organizePopup .number-green{background-color:#369A22}#organizePopup .number-purple{background-color:#8A26FD}#organizePopup .number-orange{background-color:#e67e22}#organizePopup
Cheers, Lindsay (screenshot of the issue below)