//This is how to color a specific cell in a specific case.
// Define the condition for which field
// I used as Base the RX DBGRID version

procedure TFRM_Main.DBG_MainGetCellParams(Sender: TObject; Field: TField;
AFont: TFont; var Background: TColor; Highlight: Boolean);
begin

if (Field.AsString = '0') and (Field.FullName = 'LoadingAttn') then
begin
Background := $00E69B00;
AFont.Color := clBlack;
AFont.Style := AFont.Style + [fsBold];
end
else
begin
if (Field.AsString = '0') and (Field.FullName = 'DeliveryAttn') then
begin
Background := $0082FFFF;
AFont.Color := clBlack;
AFont.Style := AFont.Style + [fsBold];
end
else
begin
if (Field.AsString = 'H') and (Field.FullName = 'EctaCode1') then
begin
Background := $008080FF;
AFont.Color := clBlack;
AFont.Style := AFont.Style + [fsBold];
end
else
begin
AFont.Color := clBlack;
AFont.Style := AFont.Style - [fsBold];
Background := clWhite;
end;
end;
end;


end;

（出处：DelphiFans.com）