fix colors

[atorasi]

After the last update my whole workspace went red :)))) please fix this and bring back the old theme

[davoDavisJr]

The module "PIL" is highlighter orange and all imports are white.
`import numpy as np
from sympy import Abs

from sympy import symbols, I
from sympy.abc import z

from sympy import diff, resultant
from sympy import expand, lambdify

import io
import tkinter as tk
from tkinter import ttk
from sympy import latex, preview
from PIL import Image, ImageTk`