Blackboard, DarkConsole and Moreblue Beamer Themes

These Beamer themes have been around quite a while, but I've just discovered them from some Japanese github sites.

The Blackboard theme may be useful for short talks with a little bit of fun:

\documentclass{beamer}
\usetheme{Blackboard}

I’ve a feeling that this DarkConsole theme would be popular with some developers.

\documentclass{beamer}
\usetheme{DarkConsole}

And the Moreblue theme has a nice, airy feel about it:

\documentclass{beamer}
\usetheme{MoreblueLight}