diff --git a/beamerthemes/beamerthemeOtago/beamercolorthemeOtago.sty b/beamerthemes/beamerthemeOtago/beamercolorthemeOtago.sty
index d7fa8e1..e2149dd 100644
--- a/beamerthemes/beamerthemeOtago/beamercolorthemeOtago.sty
+++ b/beamerthemes/beamerthemeOtago/beamercolorthemeOtago.sty
@@ -17,17 +17,18 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Set up Otago colours.
+% http://www.otago.ac.nz/administration/service_divisions/external-engagement/otago017269.html#colourvalues
 %
-\definecolor{OU blue}{cmyk}{1,0.85,0.1,0}	% RGB 0, 15, 90
-\definecolor{OU red}{cmyk}{0,0.9,0.85,0}	% RGB 100, 10, 15
-\definecolor{OU gold}{cmyk}{0,0.25,1,0}		% RGB 100, 75, 0
+\definecolor{OU blue}{cmyk/rgb}{1,0.6,0,0.25/0,0.314,0.56}      % RGB 0, 80, 143
+\definecolor{OU red}{cmyk/rgb}{0,0.95,0.9,0/0.776,0.208,0.114}  % RGB 198, 53, 29
+\definecolor{OU gold}{cmyk/rgb}{0,0.25,1,0/0.98,0.776,0}        % RGB 250, 198, 0
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Other miscellaneous colours.
 %
-\definecolor{lavender}{cmyk}{0.48,0.61,0.35,0}
+\definecolor{lavender}{cmyk/rgb}{0.48,0.61,0.35,0/0.451,0.333,0.4}  % RGB 115, 85, 102
 \colorlet{dull green}{green!40!black}
 
 \setbeamercolor{lavender text}{fg=lavender}