Index: draw_composite.c
===================================================================
--- draw_composite.c	(revision 21672)
+++ draw_composite.c	(revision 21673)
@@ -33,7 +33,7 @@
 	pcb_draw_info_t *info;
 	const pcb_layergrp_t *grp;
 	pcb_layergrp_id_t gid;
-	const char *color;
+	const pcb_color_t *color;
 
 	unsigned thin:1;
 	unsigned invert:1;
@@ -185,7 +185,7 @@
 		pcb_draw_pstks(ctx->info, ctx->gid, 0, *pstk_lyt_match);
 }
 
-void pcb_draw_groups(pcb_board_t *pcb, pcb_layer_type_t lyt, int purpi, char *purpose, const pcb_box_t *screen, const char *default_color, pcb_layer_type_t pstk_lyt_match, int thin_draw, int invert)
+void pcb_draw_groups(pcb_board_t *pcb, pcb_layer_type_t lyt, int purpi, char *purpose, const pcb_box_t *screen, const pcb_color_t *default_color, pcb_layer_type_t pstk_lyt_match, int thin_draw, int invert)
 {
 	pcb_draw_info_t info;
 	pcb_layergrp_id_t gid;
@@ -214,7 +214,7 @@
 		cctx.grp = g;
 		cctx.info = &info;
 		cctx.gid = gid;
-		cctx.color = ly != NULL ? ly->meta.real.color : default_color;
+		cctx.color = ly != NULL ? &ly->meta.real.color : default_color;
 		cctx.thin = thin_draw;
 		cctx.invert = invert;