TKINTER - Change font color for night or day

[menator01]

Maybe some thing along these lines. The time for blue is set between 1 pm and 3:59 pm then changes.

import tkinter as tk
from time import strftime


class Clock:
    def __init__(self, parent=None):
        # following allows importing class into another GUI framework.
        if not parent:
            self.parent = tk.Tk()
        else:
            self.parent = parent

        self.parent.title('My Clock')
        self.parent.geometry('200x50+50+50')

        self.clock = tk.Label(self.parent, borderwidth = 2, height=2, relief=tk.SOLID)
        self.clock.pack(padx=5, pady=2, fill=tk.BOTH)
        self.clock.configure(fg='blue')
        self.clock['text'] = strftime("%I:%M:%S")

        self.time_now = strftime("%I:%M:%S")
        self.increnment_time()

        if not parent:
            self.parent.mainloop()


    def display_time(self):
        self.clock['text'] = strftime("%I:%M:%S")
        hour = strftime('%I')
        min = strftime('%M')
        # If it is between these hours fg color is blue else it is green
        if hour >= '13' or hour <= '15' and min <= '59':
            self.clock.configure(fg='blue')
        else:
            self.clock.configure(fg='green')

    def increnment_time(self):
        self.display_time()
        # call self every 1000 ms (1 sec)
        self.clock.after(1000, self.increnment_time)

if __name__ == '__main__':
    clk = Clock()