An AI draft that needs one color and a unit

This is a draft bar chart of dorm power use by floor that an AI drew. Each bar has a different color, but the colors do not distinguish anything, and the y-axis does not say what was measured or in what unit.

Fix one line and add one line so that every bar uses the single color #2C7FB8 and the y-axis has the label Power (kWh).

Code to fix

import matplotlib.pyplot as plt

floors = ["1F", "2F", "3F", "4F", "5F"]
kwh = [420, 380, 455, 390, 510]

# AI draft
fig, ax = plt.subplots()
ax.bar(floors, kwh, color=["red", "orange", "green", "purple", "pink"])
ax.set_title("Power use by floor, Sep 2026")
plt.show()