Colour Challenge: Sunflowers

It is becoming increasingly difficult to find yellow flowers, but, to my surprise, I found these sunflowers still in bloom the other day:

^{Olympus Stylus 1s, 110mm, ISO100, f2.8, 1/640s}

Some extra (older) photos for even more sunniness:

^{Olympus Stylus 1s, 180mm, ISO100, f5.6, 1/1000s}

^{Olympus Stylus 1s, 120mm, ISO400, f5.6, 1/500s, artificial background}

Thanks for watching!