Thank you for the report.However this is a bug in OC whch has to do with asomehow weird format of saving image data. Please follow up there:
Change calendar color on device
I am using davdroid 0.4. with Baikal 2.7.3 . I have multiple calenders in Baikal an can import them all. Unfortunately they all have the same color and I can not adjust this at my Baikal server. Is there any way to change this for each calendar in the app?
Thanks in advance!
Please see #136.