The logo should be simple and modern looking. I am thinking that it should be so that the word SERUM is in black with a simple modern font and the number 3 in either fresh green or blue. The number 3 should look different, and be larger than the SERUM text, and sexy and artistic looking. The number 3 could be either behind the word SERUM, as in SERUM3 or behind it in the middle.<br />
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Competing products links (I like the font on their logos):<br />
http://m2beaute.com/<br />
http://www.lashfood.com/

Thanks for nice design and quick service.