If you are wanting to test gel colors without spending much money, have the colors printed to transparency paper with a color laser printer at some place like Staples. You can layer different colors and color strengths to get the shade you want.

This is what I did to color correct my camera flash to match the rest of the ambient lighting. Blue and green for flouescents, yellow and orange for incadescent, etc.

I would try a cool white bulb with gels of yellow and orange to take the blue tones back down vs a warm white led with blue and green gels to kill the orange tones. That way if you happen to see the gels through the insert they are closer to the color you want.

Here are some examples from Lee Filters on using colored gels with cool white leds to get the desired color output: http://www.leefilters.com/lighting/led-02.html