diff --git a/eeshow/gui-over.c b/eeshow/gui-over.c
index 409b42d..cfdd9ef 100644
--- a/eeshow/gui-over.c
+++ b/eeshow/gui-over.c
@@ -68,9 +68,9 @@ static void rrect(cairo_t *cr, int x, int y, int w, int h, int r)
 struct overlay *overlay_draw(struct overlay *over, cairo_t *cr, int *x, int *y)
 {
 	const struct overlay_style *style = &over->style;
-	const double *fg = style->fg;
-	const double *bg = style->bg;
-	const double *frame = style->frame;
+	const struct color *fg = &style->fg;
+	const struct color *bg = &style->bg;
+	const struct color *frame = &style->frame;
 	unsigned ink_w, ink_h;	/* effectively used text area size */
 	unsigned w, h;		/* box size */
 	int tx, ty;		/* text start position */
@@ -120,9 +120,9 @@ fprintf(stderr, "%d + %d  %d + %d\n",
 
 	rrect(cr, sx, sy, w, h, style->radius);
 
-	cairo_set_source_rgba(cr, bg[0], bg[1], bg[2], bg[3]);
+	cairo_set_source_rgba(cr, bg->r, bg->g, bg->b, bg->alpha);
 	cairo_fill_preserve(cr);
-	cairo_set_source_rgba(cr, frame[0], frame[1], frame[2], frame[3]);
+	cairo_set_source_rgba(cr, frame->r, frame->g, frame->b, frame->alpha);
 	cairo_set_line_width(cr, style->width);
 	cairo_stroke(cr);
 
@@ -147,7 +147,7 @@ fprintf(stderr, "%u(%d) %u %.60s\n", ty, ink_rect.y / PANGO_SCALE, ink_h, over->
 		cairo_clip(cr);
 	}
 
-	cairo_set_source_rgba(cr, fg[0], fg[1], fg[2], fg[3]);
+	cairo_set_source_rgba(cr, fg->r, fg->g, fg->b, fg->alpha);
 	cairo_move_to(cr, tx, ty);
 
 	pango_cairo_update_layout(cr, layout);
diff --git a/eeshow/gui-over.h b/eeshow/gui-over.h
index d734588..d11bcef 100644
--- a/eeshow/gui-over.h
+++ b/eeshow/gui-over.h
@@ -21,15 +21,20 @@
 #include "gui-aoi.h"
 
 
+struct color {
+	double r, g, b, alpha;
+};
+
+
 struct overlay_style {
 	const char *font;
 	unsigned wmin, wmax;
 	unsigned radius;
 	unsigned pad;	/* in x and y direction; adjust for radius ! */
 	unsigned skip;	/* should be list-specific */
-	double fg[4];
-	double bg[4];
-	double frame[4];
+	struct color fg;
+	struct color bg;
+	struct color frame;
 	double width;
 };