My Beamer theme based on CambridgeUS and Stanford's palettes: https://identity.stanford.edu/overview/color

beamerthemeStanford.sty

%
% beamerthemeStanford.sty
%
% Created by Zhiming Wang on August 26, 2014.
%
% This theme is inspired by the CambridgeUS theme packaged with the
% Beamer LaTeX package. The major colors are taken from Stanford's
% official palettes: https://identity.stanford.edu/overview/color.
%
% This work is dedicated by the author to the public domain.
%
% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
% EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
% MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
% NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
% BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
% ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
% CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
% SOFTWARE.
% 

% colors
\definecolor{cardinal}{HTML}{8C1515}
\definecolor{sandstone}{HTML}{D2C295}
\definecolor{westar}{HTML}{DAD7CB}

% base, courtesy of beamerthemeCambridgeUS.sty
\mode<presentation>
\useoutertheme{infolines}
\useinnertheme[shadow=false]{rounded}
\setbeamerfont{block title}{size={}}
% custom colors
\usecolortheme{beaver}
\setbeamercolor{frametitle}{fg=cardinal,bg=sandstone!20}
\setbeamercolor{local structure}{fg=black}
\setbeamercolor{palette primary}{fg=cardinal,bg=sandstone}
\setbeamercolor{palette secondary}{fg=cardinal,bg=westar}
\setbeamercolor{palette tertiary}{fg=white,bg=cardinal}
\setbeamercolor{titlelike}{fg=cardinal,bg=sandstone!20}
% kill certain unprofessional elements
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{bibliography item}{}
\setbeamertemplate{section in toc}%
{\inserttocsectionnumber.~\inserttocsection}
\setbeamertemplate{subsection in toc}%
{\hspace{1em}$\bullet$~\inserttocsubsection\par}
\setbeamertemplate{itemize items}{$\bullet$}

% plain and definition theorem styles in sandstone
\makeatletter
\def\th@plain{
  \normalfont
  \setbeamercolor{block title example}{bg=sandstone,fg=white}
  \setbeamercolor{block body example}{bg=sandstone!20,fg=black}
  \def\inserttheoremblockenv{exampleblock}
}
\theoremstyle{plain}
\newtheorem{conjecture}{Conjecture}
\newtheorem{proposition}{Proposition}

\def\th@definition{
  \normalfont
  \setbeamercolor{block title example}{bg=sandstone,fg=white}
  \setbeamercolor{block body example}{bg=sandstone!20,fg=black}
  \def\inserttheoremblockenv{exampleblock}
}
\theoremstyle{definition}

% highlight theorem style in cardinal
\makeatletter
\def\th@highlight{
  \normalfont
  \setbeamercolor{block title example}{bg=cardinal,fg=white}
  \setbeamercolor{block body example}{bg=cardinal!20,fg=black}
  \def\inserttheoremblockenv{exampleblock}
}
\makeatother
\theoremstyle{highlight}
\newtheorem{hconjecture}{Conjecture}
\newtheorem{hcorollary}{Corollary}
\newtheorem{htheorem}{Theorem}
\newtheorem{question}{Question}
\newtheorem{answer}{Answer}