Just change title color to simple blue.
from beampy import *
doc = document(theme="SimpleBlue", quiet=True)
with slide():
maketitle('Beampy theme ``SimpleBlue"',
author=['Author 1', 'Author 2'],
subtitle='A subtitle',
date='now')
display_matplotlib(gcs())
with slide('Slide title are in blue'):
pass
display_matplotlib(gcs())