I henna my hair burgundy which has faded a little, I just want to perk up the colour in my hair. I don't want a full henna dye job, i just want to add... well some perk

The plan is to add burgundy henna (from my local Indo/Indian mart), with my very rich and creamy conditioner. Then leave it over night, my theory is that it will add colour but not very intense.

Is there a better way to liven up my hair with henna? Again I don't want to do a full henna job just spruce up the colour a bit.

Any tips?
Modified CG since 8/12
Hair: BSL, Thick, Low Porosity, Dense, 3A
HG's: Moogoo, Ultraorganics Intense Camomile Conditioner and Clear Henna Hair Wax, Sukin Conditioners, CO, Spray Bottle, Henna
Low-Poo: Moogoo Shampoo
Co-Wash: Sukin Nourishing Conditioner
LI: Sukin Moisture Restoring
Colour: Henna