When is asks for a number, it's best if you do random high numbers. You never know which colour you'll get! There'll be lots of different shades of colours. Use turbo mode! Shift + green flag!
I'm british, so I spell it ColOUR. How to share colours you find: When the drawing is finished, then click the share your colour button. Then when the colour number appears, triple click the number to select it all, press Ctrl and C to copy it, paste it in a comment to share it. To use other people's code, then copy it from the comment, and when it asks for the colour, press Ctrl and V to paste it. There you go! Have fun sharing your colours.