Background color of cells in ConTeXt

Question

I'd like to set the background colors for cells to indicate their relations. How can I do this in ConTeXt?

Answer 1

Depends on which table macros you are using (\starttabe, \starttabulate or \bTABE/\startTABLE). I will assume \bTABLE, because that is the most versatile option.

Each cell of a TABLE is a \frame, so it takes all the options of a \frame. You can color the background of a frame using

\frame[background=color, backgroundcolor=red]{...}

The same syntax works for TABLEs. You can either pass the color the a specific cell manually,

\bTABLE[background=color]
 \bTR 
    \bTD one   \eTD 
    \bTD two   \eTD
    \bTD three \eTD
 \eTR
 \bTR 
    \bTD[backgroundcolor=red] one   \eTD 
    \bTD two   \eTD
    \bTD three \eTD
 \eTR
\eTABLE

or use setups to select the cell

\setupTABLE[1][2][background=color,backgroundcolor=red]
% col 1 row 2

\bTABLE
 \bTR 
    \bTD one   \eTD 
    \bTD two   \eTD
    \bTD three \eTD
 \eTR
 \bTR 
    \bTD one   \eTD 
    \bTD two   \eTD
    \bTD three \eTD
 \eTR
\eTABLE