\documentclass{article}
\usepackage{colortbl}
\usepackage{color}
\definecolor {tablehead}{rgb}{0.4,0.569,0.929}
\definecolor {aliceblue}{rgb}{0.94,0.97,1}
\begin{document}
\begin{tabular}{p{2cm}|p{2.25cm}}
\rowcolor{tablehead}
\color{white}\textbf{A} &
\color{white}\textbf{B}\\
\hline
\rowcolor{aliceblue}
C &
D\\
\end{tabular}
\end{document}