1st option :
get White and and Red LED separate not together Since the Bio Color You have Has Common Ground .. or find the Right Bio Color that have + Common
2nd Option :
If don;t know how to Find them What Size Bio Color Would you like .. 3mm ,5mm, 603 smd , 805 or 1206 and i find you some.
3rd option :
Use a Pic and RGB so now you have access to all 7 color when see Low on Green ROL points you can have Pic Show White which turns RED+Green+Blue
when it see Low on Red ROL Points than shows Red or what ever.
Now 3rd should be last option since its way more Install Time but its Something Diff you can change any color you want once a week .
the easy way would be to find you the right Bio Color Led or save Time and just Use 2 led
there is one White and RED with Common Anode :
http://www.dccsupplies.com/shop/product_info.php?products_id=798