Cannot change footer color to #000 (black)

[sverkerEsriSE]

In this app, either the ArcGIS Online hosted version or the downloaded version, it is not possible to choose the custom color scheme and change the footer color to #000 (black). *#*000001 will work, but not typing or picking #000 from the color picker.

Update: Apperently this also affect red (#f00), and white (#fff) - I haven't tested it myself BUG-000093041