I have a web app that uses our own basemaps from the basemap gallery. If I open the basemap in the portlas map it shows correctly. But in the app it doesn't show the right colors. The basemap is combined from two layers.
The top layer with elevation colors load in grey instead of color palette.
The basemap in question is the first one: "Digitalni model reliefa Slovenije"
Link to the web map used in Basemap gallery: https://gis.arso.gov.si/portal/home/item.html?id=159b958808e54afa9c5caaf444dce019
Link to the portal map page: https://gis.arso.gov.si/portal/home/webmap/viewer.html?useExisting=1
Link to the app : https://gis.arso.gov.si/portal/apps/webappviewer/index.html?
Thanks for your help,