Adobe MAX 2015 - Ishihara Test for Color Blindness
I designed this illustration to demonstrate the Color Blindness simulation feature in Illustrator and Photoshop during the "Color and Creative Cloud" session I did with my friend Rufus Deuschler at Adobe MAX 2015 in Los Angeles.
This Soft Proofing feature is really important to be sure that Color Blind people will be able to properly understand your signboards, logos, charts… 
Two views of the same file.
On the left: Actual colors.
On the right: Pronotopia Type P Colorblind Soft Proofing (menu View > Proof Setup > Color Blindness (Protanopia-type)
Here an article about Soft-proofing for color blindness in Photoshop and Illustrator: