Klimper -

The interface uses color-coding—turquoise for major, purple for minor—to make theory intuitive. How It Works: A Streamlined Workflow

Drag the desired chords into the main area to create a sequence. Klimper

It is a composition tool, not a sound generator itself (though it has built-in sounds for prototyping). Integration with DAWs The interface uses color-coding—turquoise for major