Fretboard Diagram

This is a diagram of a guitar fretboard in standard tuning all the way to the 24th fret which means each string has 2 octaves on a fretboard of 24.

All the natural tones(notes without accidentals) are color coded to make it easier to find any note needed.

A=Red

B=Green

C=Blue

D=Orange

E=Yellow

F=Purple

G= green/yellow

Each tone with an accidental( Sharp or flat symbols) are all grey.

Notice how each grey tone has two different note names, that is because the two notes are one in the same. A half step higher than A is A sharp (A#) which is followed by B. A half step lower than B is B flat (Bb) which is followed by A. Both A# and Bb are the same note but you change which note you're using depending on if you're trying to make a higher toned A or a lowered tone B. 

The general rule for sharps(#) and flats(b) are that you use sharps when ascending and flats when descending.