The blues scale is the minor pentatonic plus the ♭5 "blue note" — that extra tone is what gives blues and rock soloing its grit and tension.
The blues scale is the minor pentatonic plus the ♭5 "blue note" — that extra tone is what gives blues and rock soloing its grit and tension. On guitar, the g blues scale uses the notes G, A♯, C, C♯, D, F — the diagram above shows every one of them across all positions of the neck, with the root (G) highlighted so you can anchor each shape.
KnowYourNeck turns this into an interactive neck you can rotate through every position, switch between note names and scale degrees, and drill one box at a time with Focus Mode. It's the fastest way to actually learn the blues scale instead of just reading a chart.