Crack the 3 7 10 26 Code!

In the spirit of keeping things simple, we must remember that there are only:

• 3 COLORS – Picasso, Rembrandt and Matisse created masterpieces with them.
• 7 NOTES – Beethoven, Bach and Vivaldi used them to compose beautiful music.
• 10 DIGITS – Einstein, Hawking, and Tesla used them to discover hidden mysteries.
• 26 LETTERS – Shakespeare, Hemingway, and Twain used them to unleash imagination.