Because it is Monday, with all of the inherent fears, anxieties and pains of returning to work and/or school, there are three choices you can use alone, or in combination:
Red, Black, Grey
Generally, a more productive day, Tuesday offers hope, energy and growth.
Green
Meetings are scheduled on Wednesdays more than any other day. Less people call out sick and therefore there are more opportunities to interact with others.
Yellow, Orange, Gold, Copper, Bronze, Brown, Beige, Pumpkin, and by special request, (VC) Pink, but you may be considered mean.
Weekend is in sight. Projects are getting done, errands are run, work is progressing.
Blue
Finish up the week's work, prepare for the next, enjoy life and be happy.
Purple
Bring some whimsey into your life. Reward yourself.
Star Trek, Star Wars, DC, Marvel
For National, International, or Galactic Holidays, it is allowable to display colors, logos, or images of the nation, world, or galaxy and appropriate likenesses therein.