Consider the simple case where myBranch is created from master. There are no other branches.
myBranch is the current branch and therefore shown on the left. Below where myBranch is created the master is shown. Above where myBranch is created myBranch is on the left and master is on the right. However the colour of the left column remains the same. It would be clearer if the master branch had the same colour all the way up so that is easier to tell where myBranch was created.
Alternatively is there any easy way to go to the commit where a branch was created?