Google Scripts App - Validating cell color, submitting data and saving to database

I am trying to code where if cell color is white return False otherwise return true. when I submit the data if the cell color is other than white, save to a database as this would be considered true. However, I have been testing the validation of the color and changing the code a number of times but it doesn't seem to work. It would either accept both scenarios (cell color white or green) or doesn't save the data. If the validation is true then I get a ui.alert message "New Data Save". Any help would truly be appreciated.

//Validating Cell Color #00FF40 (green)
var cell = "B6";
//var colors = ["#00FF40"];
var ss = SpreadsheetApp.getActive();
var sheet = ss.getActiveSheet();
var range = sheet.getRange(cell);
var currentColor = range.getBackground();
if (currentColor == "#FFFFFF") {
return false;
}
return true;
}
//Function to submit the data to Database Sheet
function SubmitData(){
//declare a variable and set the reference of action google sheet
var myGoogleSheet = SpreadsheetApp.getActiveSpreadsheet();
var shUserForm = myGoogleSheet.getSheetByName("UserForm");
var datasheet = myGoogleSheet.getSheetByName("Database");
// to create the instance of the user-interface environment to user the alert feature
var ui=SpreadsheetApp.getUi();
var response=ui.alert("Submit", "Do you want to submit the data?",ui.ButtonSet.YES_NO);
//checking user response
if(response==ui.Button.NO){
return;//to exit from this function
}
if(validateEntry()==true){
var blankRow=datasheet.getLastRow()+1; //identify the next blank row
//code to update the data in the database
datasheet.getRange(blankRow,1).setValue(shUserForm.getRange("B6").getValue());//Happy value in cell
// code to update the created date and time
datasheet.getRange(blankRow,4).setValue(new Date()).setNumberFormat('yyyy-mm-dd h:mm');
// submitted by
//datasheet.getRange(blankRow,5).setValue(Session.getActiveUser().getEmail());
ui.alert('"New Data Saved ' + shUserForm.getRange("B6").getValue()+ '"');
shUserForm.getRange("B6").setBackground('#FFFFFF');
}
}

JavaScript is a case-sensitive language. Try Logger.log(currentColor) in your function validateEntry() (that you forgot to declare in your post :D). You'll see that is a string in lower case (#ffffff). So, you only need to change from:

if (currentColor == "#FFFFFF")

to:

if (currentColor == "#ffffff")

String