comp-syntax-gu-mlt/lectures/lecture-n-1/beamerthemelucid.sty

\usepackage{tikz}
\usetikzlibrary{calc}

% -------- COLOR SCHEME --------
\definecolor{PrimaryColor}{RGB}{7,79,140} % primary color (blue)
\definecolor{SecondaryColor}{RGB}{242,88,26} % bulleted lists
\definecolor{BackgroundColor}{RGB}{255,255,255} % background & titles (white)
\definecolor{TextColor}{RGB}{0,0,0} % text (black)
\definecolor{ProgBarBGColor}{RGB}{175,175,175} % progress bar background (grey)


% set colours
\setbeamercolor{normal text}{fg=TextColor}\usebeamercolor*{normal text}
\setbeamercolor{alerted text}{fg=PrimaryColor}
\setbeamercolor{section in toc}{fg=PrimaryColor}
\setbeamercolor{structure}{fg=SecondaryColor}
\hypersetup{colorlinks,linkcolor=,urlcolor=SecondaryColor}

% set fonts
\setbeamerfont{itemize/enumerate body}{size=\large}
\setbeamerfont{itemize/enumerate subbody}{size=\normalsize}
\setbeamerfont{itemize/enumerate subsubbody}{size=\small}

% make pixelated bullets
\setbeamertemplate{itemize item}{
	\tikz{
		\draw[fill=SecondaryColor,draw=none] (0, 0) rectangle(0.1, 0.1);
		\draw[fill=SecondaryColor,draw=none] (0.1, 0.1) rectangle(0.2, 0.2);
		\draw[fill=SecondaryColor,draw=none] (0, 0.2) rectangle(0.1, 0.3);
	}
}
\setbeamertemplate{itemize subitem}{
	\tikz{
		\draw[fill=SecondaryColor,draw=none] (0, 0) rectangle(0.075, 0.075);
		\draw[fill=SecondaryColor,draw=none] (0.075, 0.075) rectangle(0.15, 0.15);
		\draw[fill=SecondaryColor,draw=none] (0, 0.15) rectangle(0.075, 0.225);
	}
}
\setbeamertemplate{itemize subsubitem}{
	\tikz{
		\draw[fill=SecondaryColor,draw=none] (0.050, 0.050) rectangle(0.15, 0.15);
	}
}

% disable navigation
\setbeamertemplate{navigation symbols}{}

% disable the damn default logo!
\setbeamertemplate{sidebar right}{}

% custom draw the title page above
\setbeamertemplate{title page}{}

% again, manually draw the frame title above
\setbeamertemplate{frametitle}{}

% disable "Figure:" in the captions
% TODO: somehow this doesn't work for md-generated slides
%\setbeamertemplate{caption}{\tiny\insertcaption}
%\setbeamertemplate{caption label separator}{}

% add some space below the footnotes so they don't end up on the progress bar
\setbeamertemplate{footnote}{ 
	\parindent 0em
	\noindent 
	\raggedright 
	\hbox to 0.8em{\hfil\insertfootnotemark}
	\insertfootnotetext
	\par
	\vspace{2em}
}

% add the same vspace both before and after quotes 
\setbeamertemplate{quote begin}{\vspace{0.5em}}
\setbeamertemplate{quote end}{\vspace{0.5em}}

% progress bar counters
\newcounter{showProgressBar}
\setcounter{showProgressBar}{1}
\newcounter{showSlideNumbers}
\setcounter{showSlideNumbers}{1}
\newcounter{showSlideTotal}
\setcounter{showSlideTotal}{1}

% use \makeatletter for our progress bar definitions
% progress bar idea from http://tex.stackexchange.com/a/59749/44221
% slightly adapted for visual purposes here
\makeatletter
\newcount\progressbar@tmpcounta% auxiliary counter
\newcount\progressbar@tmpcountb% auxiliary counter
\newdimen\progressbar@pbwidth %progressbar width
\newdimen\progressbar@tmpdim % auxiliary dimension

\newdimen\slidewidth % auxiliary dimension
\newdimen\slideheight % auxiliary dimension

% make the progress bar go across the screen
\progressbar@pbwidth=\the\paperwidth
\slidewidth=\the\paperwidth
\slideheight=\the\paperheight

% draw everything with tikz
\setbeamertemplate{background}{ % all slides
	% progress bar stuff
	\progressbar@tmpcounta=\insertframenumber
	\progressbar@tmpcountb=\inserttotalframenumber
	\progressbar@tmpdim=\progressbar@pbwidth
	\divide\progressbar@tmpdim by 100
	\multiply\progressbar@tmpdim by \progressbar@tmpcounta
	\divide\progressbar@tmpdim by \progressbar@tmpcountb
	\multiply\progressbar@tmpdim by 100

	\begin{tikzpicture}
		% set up the entire slide as the canvas
		\useasboundingbox (0,0) rectangle(\the\paperwidth,\the\paperheight);

		% background
		\fill[color=BackgroundColor] (0,0) rectangle(\the\paperwidth,\the\paperheight);

		\ifnum\thepage=1\relax % only title slides
			% primary color rectangle
			\fill[color=PrimaryColor] (0, 4cm) rectangle(\slidewidth,\slideheight);

			% text (title, subtitle, author, date)
			\node[anchor=south,text width=\slidewidth-1cm,inner xsep=0.5cm] at (0.5\slidewidth,4cm) {\color{BackgroundColor}\Huge\textbf{\inserttitle}};
			\node[anchor=north east,text width=\slidewidth-1cm,align=right] at (\slidewidth-0.4cm,4cm) {\color{PrimaryColor}\large\textbf{\insertsubtitle}};
			\node at (0.5\slidewidth,2cm) {\color{PrimaryColor}\LARGE\insertauthor};
			\node at (0.5\slidewidth,1.25cm) {\color{PrimaryColor}\Large\insertinstitute};
			\node[anchor=south east] at(\slidewidth,0cm) {\color{PrimaryColor}\tiny\insertdate};
		\else % other slides
			% title bar
			\fill[color=PrimaryColor] (0, \slideheight-1cm) rectangle(\slidewidth,\slideheight);

			% slide title
			\node[anchor=north,text width=\slidewidth-0.75cm,inner xsep=0.5cm,inner ysep=0.25cm] at (0.5\slidewidth,\slideheight) {\color{BackgroundColor}\huge\textbf{\insertframetitle}};

			% logo (TODO: autoscale; now it expects 350x350
			\node[anchor=north east] at (\slidewidth-0.25cm,\slideheight+0.06cm){\insertlogo};

			% show progress bar
			\ifnum \value{showProgressBar}>0\relax%
				% progress bar icon in the middle of the screen
				\draw[fill=ProgBarBGColor,draw=none] (0cm,0cm) rectangle(\slidewidth,0.25cm);
				\draw[fill=PrimaryColor,draw=none] (0cm,0cm) rectangle(\progressbar@tmpdim,0.25cm);

				% bottom info
				\node[anchor=south west] at(0cm,0.25cm) {\color{PrimaryColor}\tiny\vphantom{lp}\insertsection};
				% if slide numbers are active
				\ifnum \value{showSlideNumbers}>0\relax%
					% if slide totals are active
					\ifnum \value{showSlideTotal}>0\relax%
						% draw both slide number and slide total
						\node[anchor=south east] at(\slidewidth,0.25cm) {\color{PrimaryColor}\tiny\insertframenumber/\inserttotalframenumber};
					\else
						\node[anchor=south east] at(\slidewidth,0.25cm) {\color{PrimaryColor}\tiny\insertframenumber};
					\fi
				\fi
			\else
				% section title in the bottom left
				\node[anchor=south west] at(0cm,0cm) {\color{PrimaryColor}\tiny\vphantom{lp}\insertsection};
				% if we're showing slide numbers
				\ifnum \value{showSlideNumbers}>0\relax%
					% if slide totals are active
					\ifnum \value{showSlideTotal}>0\relax%
						% slide number and slide total
						\node[anchor=south east] at(\slidewidth,0cm) {\color{PrimaryColor}\tiny\insertframenumber/\inserttotalframenumber};
					\else
						\node[anchor=south east] at(\slidewidth,0cm) {\color{PrimaryColor}\tiny\insertframenumber};
					\fi
				\fi
			\fi
		\fi
	\end{tikzpicture}
}
\makeatother

\AtBeginSection{\frame{\sectionpage}} % section pages
\setbeamertemplate{section page}
{
	\begin{tikzpicture}
		% set up the entire slide as the canvas
		\useasboundingbox (0,0) rectangle(\slidewidth,\slideheight);
		\fill[color=BackgroundColor] (-1cm, 2cm) rectangle (\slidewidth, \slideheight+0.1cm);
		\fill[color=PrimaryColor] (-1cm, 0.5\slideheight-1cm) rectangle(\slidewidth, 0.5\slideheight+1cm);
		\node[text width=\the\paperwidth-1cm,align=center] at (0.4\slidewidth, 0.5\slideheight) {\color{BackgroundColor}\Huge\textbf{\insertsection}};
	\end{tikzpicture}
}