We improved the work of color picker in Pricing Table plugin and released a new version. Please update it.
Now you can write the hex-code manually. Just follow the next steps:
1) Select the text in a cell and click on “Change color” button – http://prntscr.com/e0xxz8
2) Select the text in # field – http://prntscr.com/e0xy9l
3) Be careful, don’t press “Delete” or “Backspace” on a keyboard. Just begin to type the new hex code.
4) After you finished typing, just click anywhere on your screen and color will be changed.