show_color and embed_colorpicker
A prerequisite to playing with ipythonblocks is understanding how RGB colors work. To make it easy for students to experiment with different combinations of RGB ipythonblocks includes a show_color function that just shows a big stripe of a given color.
from ipythonblocks import show_color, embed_colorpicker
show_color(12, 123, 234)
If students are expected to have an internet connection the embed_colorpicker function can be used to embed the website ColorPicker.com in the Notebook.
embed_colorpicker()