Connecting 4-pin RGB led
Wie gehts?

Looks like a common cathode arrangement. So let's assume that a \$3\:\text{V}\$ supply is sufficient for the purposes of all three LEDs, for now, and more forward.







simulate this circuit &ndash; Schematic created using CircuitLab

The above schematic doesn't specify any of the resistor values. That is for you to work out. Just try some different values until you get what you want. \$R_3\$ is likely to be the smallest value resistor. But you can play with \$R_1\$ and \$R_2\$ to set various currents in their LEDs so that you get the orange color you desire.

Values for the resistors will be on the order of tens or hundreds of Ohms. None of them will be as high as being in the thousands, I suspect. But it's not hard to play with these values on a solderless breadboard to work out what gets the right orange color for you.