How to display an image in Project Center View?

Hello Community,

i want to display an Image (traffic light) in the Project Center view.In this specific case i dont want to use a lookup fiel to display the image. I want to use a costum field with a IIF() formula.

Here is an example of the formula design:

IIf([TEST] = "Accepted"; "IMAGE"; "0")

In SharePoint lists you use the following formulas:

IIf([TEST] = "Accepted"; "<img src='/_layouts/15/inc/PWA/images/cf_53p.png' border='0'/>"; "0")

The second formula doesn´t work in the Project Center view.

Can anyone help me in this case?!

Thanks in advance