Set excel cell color with javascript created with cfspreadsheet

I've create a excel file with CFSpreadSheet and now I want to change the color of a cell to a hexcolor that is not available with CFSpreadSheet.  Can it be done with javascript?

<cfset xl = spreadsheetNew("Hazard Details",true)>

<cfset SpreadsheetAddRow(xl,"Test")>

<cfset SpreadsheetFormatCell(xl,{color="red",bold="true"},#xl.rowcount#,1)>

Will set it to red.  But I want to use a color that is not available with cfspreadsheet like hexcolor #355f91

something like:

<cfset SpreadsheetFormatCell(xl,{color="#355f91",bold="true"},#xl.rowcount#,1)>