SpeedCrunch calc (qt)

Possible pycalc replacement (in Buster repos)
speedcrunch.png-LXQZq4spblPqgDX-md
Custom color schemes.

~/.local/share/SpeedCrunch/color-scheme/bunsenBeam.json

{
    "cursor": "#74998B",
    "number": "#74998B",
    "parens": "#AD7FA8",
    "result": "#689FCF",
    "comment": "#894B7A",
    "matched": "#64507B",
    "function": "#EF2928",
    "operator": "#C4A000",
    "variable": "#4A9A07",
    "scrollbar": "#575E68",
    "separator": "#AD7FA8",
    "background": "#333D4D",
    "editorbackground": "#333D4D"
}

Cons: Ugly icon.