On May 31, 2016, while I was taking my walk around National Hill, I actually saw all kinds of clouds in the sky.
In the first picture, the sun is trying to shine through these dark clouds! If you look in between the clouds, you can see the dark grey clouds and the light grey clouds here.
In the second picture, you can see three colors in one cloud. The cloud is white, grey and dark here.
These may be some of the best clouds that I have ever seen!