Control section

Here you choose target for colorchange (Background, link, etc)
Swap/undo colorselection
Specify colorvalue
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Shows colorlayout

Scroll down to see different colorlayout for tables

Remember to read the tips for using NB-safecolor at the demo-page
Statusline

Shows current target for colorchange
Color cells

Here you choose which color to be applied to current target

Click colortext in cells to select color