1、表格线颜色
正文中添加库 \usepackage{array}
表格下面用 \arrayrulecolor{blue}
2、表格内字体颜色：需要一格一格的内容分别使用 {\color{blue} text}，与正文改变字体颜色方式一样，
3、表头颜色将{\color{blue}text} 放在caption前面
来看举例：
\begin{table}[h]
\arrayrulecolor{blue}%增加
\centering
{\color{blue}\caption{Correlation.}}%增加
\begin{tabular}{cccccc}
\hline
\hline
{\color{blue}Feature} & {\color{blue}1} & {\color{blue}2} & {\color{blue}3} &{\color{blue}4} &{\color{blue}Residual} \\ \hline {\color{blue}$ {p_r} $} & {\color{blue}5} & {\color{blue}6} & {\color{blue}7} & {\color{blue}8} & {\color{blue}9} \\ \hline
\hline
\end{tabular}
\label{1}
\end{table}
效果：