Measuring Diode "Pushback" Voltage
None of those values make sense.  Red is usually around 1.8V, green is a little over 2 V.
You can't measure the forward voltage of an LED with just a voltmeter.  You have to connect your LED to a current source and measure the voltage across the diode when current is flowing through it.
Many multimeters have a diode test function that does exactly what I've described - it pushes a low current through the diode and measures the voltage across it.

Whatever you were measuring, it wasn't the forward voltage of the LED.  On the 200mV scale, your numbers would be millivolts, not volts as you wrote.
I expect you were getting a tiny little bit of current from the light hitting the LED.  That could be enough for your meter to register a few millivolts.