gfio: change color of graphs

Green for reads, and red for writes. Seems to be what people
use mostly, so lets make it less confusing. Will also want
a title for that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/gfio.c b/gfio.c
index b38b490..4d9d73d 100644
--- a/gfio.c
+++ b/gfio.c
@@ -143,8 +143,8 @@
 	graph_x_title(ui->iops_graph, "Time (secs)");
 	graph_add_label(ui->iops_graph, "Read IOPS");
 	graph_add_label(ui->iops_graph, "Write IOPS");
-	graph_set_color(ui->iops_graph, "Read IOPS", 0.7, 0.0, 0.0);
-	graph_set_color(ui->iops_graph, "Write IOPS", 0.0, 0.0, 0.7);
+	graph_set_color(ui->iops_graph, "Read IOPS", 0.13, 0.54, 0.13);
+	graph_set_color(ui->iops_graph, "Write IOPS", 1.0, 0.0, 0.0);
 	add_invisible_data(ui->iops_graph);
 }
 
@@ -158,8 +158,8 @@
 	graph_x_title(ui->bandwidth_graph, "Time (secs)");
 	graph_add_label(ui->bandwidth_graph, "Read Bandwidth");
 	graph_add_label(ui->bandwidth_graph, "Write Bandwidth");
-	graph_set_color(ui->bandwidth_graph, "Read Bandwidth", 0.7, 0.0, 0.0);
-	graph_set_color(ui->bandwidth_graph, "Write Bandwidth", 0.0, 0.0, 0.7);
+	graph_set_color(ui->bandwidth_graph, "Read Bandwidth", 0.13, 0.54, 0.13);
+	graph_set_color(ui->bandwidth_graph, "Write Bandwidth", 1.0, 0.0, 0.0);
 	add_invisible_data(ui->bandwidth_graph);
 }