Created attachment 1112830 [details]
screenshot for issue with unreadable possibilities for method params.

Description of problem:
I'm seeing a strange issue which shows up once I use code completions for a method and then see the possibilities for variables the method takes which are in current scope. The possibilities listed are unreadable since they are white on white background.

Version-Release number of selected component (if applicable):
eclipse-platform-4.5.1-6.fc23.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Create a string variable in some method in Eclipse JDT
2. Be sure to have some int variables in scope suitable for substring params
3. Hit <variable-name> + "." for the string variable. This should show
   auto-completion with all suitable methods on a string.
4. Select method "substring(int beginIndex, int endIndex)".
5. The input focus should move to the first param in method substring
   (beginIndex) and some possibilities should show up. At this point you should
   have it reproduced.

Actual results:
One only sees some red-icons with the variable names being white on white background. Thus, variables are unreadable. See attached screenshot.

Expected results:
Variable names readable, for example black on white background.