The code below will help in creating transparent objects, texts and many more things in PyS60.

import appuifw
import graphics
import e32
 
def quit():
global running
running = False
 
def handle_redraw(rect):
canvas.clear(0×009900)
canvas.polygon(((0, 0), (bw, 0), (0, bh)), outline = 0xFFFF00, fill = 0xFFFF00)
 
textimgsize = (320, 20)
textimg = graphics.Image.new(textimgsize, "L")
textimg.clear(0×000000)
colorimg = graphics.Image.new(textimgsize)
colorimg.clear(0xFFFFFF)
 
textmsg = u"75% transparent text"
fontspec = (None, None, graphics.FONT_BOLD)
 
tleft, ttop, tright, tbottom = textimg.measure_text(textmsg, fontspec)[0]
tw = (tright - tleft)
th = (tbottom - ttop)
 
alpha = 0xC0C0C0
textimg.text((-tleft, -ttop), textmsg, alpha, fontspec)
canvas.blit(colorimg, target = ((bw - tw) / 2, (bh - th) / 2), mask = textimg)
 
canvas = appuifw.Canvas()
appuifw.app.body = canvas
bw, bh = canvas.size
appuifw.app.exit_key_handler = quit
 
running = True
while running:
handle_redraw(None)
e32.ao_yield()