SYMPTOM:
In Internet Explorer, a quick symbol (Arrow) is fulfilled with color, while in Chrome it is edge of the shape and its visibility is significantly different in Advanced Threshold Formatting on grid.
Internet Explorer:

Chrome:

STEPS TO REPRODUCE:
1. Create any blank report on Strategy Web 10.4 and above.
2. Open up the advanced threshold on grid.
3. Go to Formatting on advanced threshold.
4. Go to quick symbol, then arrow appears under drop down.
5. Between Internet Explorer and Chrome, quick symbols (arrows) look different.
WORKAROUND:
This is not something Strategy can change it since it's not Strategy code and browser dependent. It is how Chrome renders up arrow code from UTF. If need a workaround, recommend using images to display the ‘up arrow’ as you want to see it.
The Strategy internal reference number for this article is KB439814. KB439814