How do I add color coding to a calendar report based on text?

here is an example of a formual to put three fields on a calendar in color

var text TextBlock=
"<b>" &
List(" | ",
[Quote - Project] ,
[Installer Name],
If([Planned Business Days to Install]>1, ToText([Planned Business Days to Install]) &  " days", ToText([Planned Business Days to Install]) & "day")
& "<br>" &List("|", [Customer Name], ToText([Related Quote])))
& "</b>";

"<span style=\"background-color:" & [Color Code]  &";\">" & $TextBlock &"</span>"

In my setup, the field for [Color code] is a lookup field that  has like  #FFF000 or whatever the hex code is for the color.