[Bug] Map tooltip arrow should be black

Map tooltip arrow  is white (should be black)

**To Reproduce**
Steps to reproduce the behavior:
1. See map card

**Expected behavior**
arrow  should be black

**Screenshots**
![image](https://user-images.githubusercontent.com/11487010/101258360-a87f4800-372a-11eb-963c-5e39ea07de7a.png)

**Environment**
Browser: Chrome 
Environment: Staging 

