[BUG] When using Webdings as the font, color is controlled by markingColorRGBA

[minjungkim85]

Describe the bug
When using Webdings as the font, the font color is controlled by markingColorRGBA, not fontColorRGBA.

To Reproduce
I was interested in taking some luminance measurements of the screen, so I used Webdings as my font and used a text file with lower case 'g'. I was using ordinary reading as the task.

bug.csv
blocks.txt

[denispelli]

https://trello.com/c/pxgqdI5W