You may need to pre-lighten your existing hair color to make room for the new more vibrant color. If you can buy a Kicker or Booster to add to your color that makes a HUGE difference in achieving that Bright Amazing Shade ! Stick with the same brand as your hair line if they make one.
pravana , (one of my favorites ) makes awesome vibrant reds & pinks ..if you can get your hands on their color line...you can even mix 2 shades to get the ideal shade...
Temporary Hair Color - Manic Panic & affordable & no mixing
open to public is Sally's Beauty & they have a few choices for brands.
Red FADES the fastest so maybe reduce washing your hair a little less if possible to hold color. Also, you may see some color transfer to pillow cases etc. so get rid of your Hotel White pillow cases for now & good luck.