Description:
Calc UI: colors rectangle for color of gradient for figure in Sidebar are black (see screenshot from attach). LO with autoupdater from Markus, OpenGL - off!

Version: 6.0.0.0.alpha0+
Build ID: ca95e886b42157d1d6394ed0b4c910978f5c2fda
CPU threads: 4; OS: Windows 6.1; UI render: default; 
Locale: ru-RU (ru_RU); Calc: CL

Steps to Reproduce:
1. Open Calc
2. Draw any figure and select it
3. Open Sidebar
4. Select in Area fill -> Gradient
5. On two drop-down lists there are color rectangle. They both are black instead color for any select color. 

Actual Results:  
both color rectangles are black instead color for any select color. 

Expected Results:
each rectangle is right color


Reproducible: Always

User Profile Reset: No

Additional Info:


User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:57.0) Gecko/20100101 Firefox/57.0