WHOSE kitchen did you say it is? I thought I saw the first-person-singular-possessive pronoun "MY" in the question, written by YOU, - didn't I? But then - came the first-person-PLURAL 'our' later in the explanation. You may have to do some negotiating and selling of your idea, which seems to make good sense, - to offset the white with a darker shade of some color. Citrus colors are pretty pale and could be really boring, unless there's limited light in the narrow galley, which could benefit from brighter shades of whatever color is chosen.
If the roommate has equal 'say', sounds like he/she gets to vote and it would be wise to be fair at the onset, unless you are OK with paying the rent by yourself later on. This may set a pattern in your relationship, so more than a color may be involved.
But if you already do pay the rent, then you could take the driver's seat and proceed with something dark, but avoid both citrus and blue hues. Gray or taupe are actually good wall choices. Accent colors can change as the mood (or whosever's preference) happens to change, as is likely from time to time. Then you're stuck with a definite wall color, but if it's more neutral, the sky's the limit for accessory colors.