Build a URL

Hi there,

I have built an URL as a measure in Power BI where I am passing some parameters to a Report in SSRS. This report is built in Report Builder and I have several Report Parameters. These parameters are set in Power BI and I concatenate the SELECTEDVALUE so in the URL it is set the value chosen on the Report Parameter. I would like to pass several parameters, for example:

Let's suppose I have an slicer named Colors with the possible values Red, Green and Blue. 

On my URL I am able to pass as ReportParameter_Color=Red but now I would want to choose Red and Green and I don't know how to pass to the Report Parameter multiple values. The parameter is set in Report Builder able to multiple selections.

Thanks in advance