A great tool for adding a different color in a chord progression is to include one or more half-diminished seventh chords (sometimes just called half-diminished chords).
Another common way to create more interesting chords by altering the notes of the basic triad is to form what are called suspended fourth chords.
When first learning piano, or any instrument for that matter, you want to learn the names of the notes on the staff. Knowing the note names will allow you to further your skills with music theory, sight reading, analysis, and so on.
The most common and most useful of these chords is the seventh, which you can use pretty much anywhere just to add a slightly different color to a chord, or in some types of progression to give the sequence of chords some extra thrust, because the added seventh is a mild dissonance, or clash, that makes the chord sound like it wants to move somewhere.
Musical modes constitute a form of scale complete with their own distinctive melodic traits. The seven modes have their roots in some of western music’s oldest forms.
Another great way to create more interesting chord progressions is to use a pedal note or pedal point. A pedal note is a static bass note that sticks around for a few measures while the chords change over the top.