Do you remember the "buffer king" easter egg in Scratch Live? Due to popular demand, we've added this as an official feature to the Serato DJ 1.7.4 update.
The EQ Colored waveform option changes the waveform colors in Serato DJ to reflect your EQ changes. For example, taking out the bass will remove all the red from the waveform, taking out the high end will remove all the blue and taking the midrange out will remove all the green.
This is only available for Serato DJ supported controllers and Serato DJ supported, MIDI enabled mixers.
To enable this feature, make sure you have updated to Serato DJ 1.7.4, then select "EQ Colored Waveforms" in the Library + Display tab of the setup screen.