Spectrometry in Chemistry & Flame Test Lab
... two colors that are two similar (dark yellow and orange) in a flame test ... 


Do you know what the two compounds might be?


   The yellow colour typically indicates sodium, the orange flame colour calcium.


In order to distinguish the two compounds, you have several options:


Use a different method


   You can try to precipitate the calcium ions in the form of an insoluble salt, such as its oxalate.

Refine your flame test


   View the flames though a piece of cobalt glass! This filters of the yellow flame colour typical for sodium. Note that the flame colours for the other metals will look different now!