Color harmony calculator
A harmony on the wheel is a turn of hue, not a new tube. Pick a color and the calculator shows its complement, two analogous hues, a triad and a split-complementary pair.
Calculator form
How to use
Pick a color from the work
An eyedropper sample, or the nearest hue to a tube.
Read the scheme
Analogous is quieter, a triad is stronger, the complement is the sharpest accent.
Mix it, do not copy the hex
On paper the same hue turn comes from your paints, not from the screen code.
Sample calculations
Pure red #ff0000
The complement is cyan #00ffff
Common mistakes
Mistake
Changing lightness and deciding the scheme failed → The calculator keeps lightness. Make it darker or lighter on the palette.
FAQ
Why is the complement of red not tube green?
Opposite red on the wheel is cyan. A green from the box is often yellower or bluer than that spot.
Can I use only two of the colors?
Yes. The list is a set of candidates. A picture usually needs two or three, not all seven.
Lock it in with practice
Open the free editor and apply the result — a short sketch beats more reading.