Pedals that stack with the Electro-Harmonix Crayon

NUX Recto Distortion

Electro-Harmonix Crayon leans toward transparent, and that's a real, usable character to pair with

Walrus Audio Badwater Bass Pre-Amp

Electro-Harmonix Crayon leans toward transparent, and that's a real, usable character to pair with

Shin's Music Shin's Music OD-X Custom Meta-Red

Both lean toward colored and transparent respectively — close enough in character that they complement instead of clashing

One Control OC Pale Blue

What Electro-Harmonix Crayon brings here leans toward transparent — that's worth building a pairing around