Layer Colours not appearing properly.

Hi I am new to using layers and can't figure out why my newly created geometry isn't showing with the right colour.  I am selecting the edges of a model and converting the edges but the colour is always red.  Even if I select the colour Yellow for the layer.  So far I have had to add the new geometry then select the line and change the color manually.  Is there a better way of doing this?

Cheers

SolidworksDrawings And Detailing