Check out My Create Ink's SU Color Lab link listed at the Sites I Visit on the bottom right side of my blog. It's similar to the Scrapitude Color Combo site of days gone by. You can select colors, right-click to lock them, then have the "picker" select others. I plan to use it to play with color challenges.
More info, snipped from their site:
This site enables you to cross-match colors from various companies.
To get started, select your 'From' and 'To' choices at the upper left of the screen.
The lower left will present you with options for selecting specific color groups.*
*For Copic, you can optionally choose specific sets to match from/to..
Once you have made your selections, click 'Match Colors'
The matches with the highest rating will be displayed with the search results.
Δ means the match listed is based on color quantization (mathematics).
♥ means the match listed was recommended by a user.
You can suggest and vote on additional matches under the 'Advanced' links.
Thank you to all the people who have donated.
Your support keeps the ColorLab up and running.
If you would like to make a donation to help support and expand the ColorLab, just click the link to the right. Your donations are greatly appreciated.
We wish everyone a happy new year and hope you enjoy this new utility!