A small cool little feature for VL (but could be nice in VVVV too): Copy/Paste Color.
Copy a Color from another soft or from a Color Palette in Hexadecimal (the simplest way to copy a color, it’s just one value)
Double-click a Color IOBox in VVVV/VL, then Ctl+V.
Should work with or without the #, either #FF0000 or FF0000…