Index: libmpdemux/demux_mkv.c
===================================================================
--- libmpdemux/demux_mkv.c	(revision 25320)
+++ libmpdemux/demux_mkv.c	(working copy)
@@ -342,7 +342,7 @@
 static int
 vobsub_parse_custom_colors (sh_sub_t *sh, const char *start)
 {
-  int use_custom_colors, i;
+  int use_custom_colors, i, tmp;
 
   use_custom_colors = 0;
   start += 14;
@@ -361,8 +361,9 @@
          start++;
        for (i = 0; i < 4; i++)
          {
-           if (sscanf(start, "%06x", &sh->colors[i]) != 1)
+           if (sscanf(start, "%06x", &tmp) != 1)
              break;
+           sh->colors[i] = vobsub_rgb_to_yuv(tmp);
            start += 6;
            while ((*start == ',') || isspace(*start))
              start++;
Index: vobsub.c
===================================================================
--- vobsub.c	(revision 25320)
+++ vobsub.c	(working copy)
@@ -818,6 +818,18 @@
     return y << 16 | u << 8 | v;
 }
 
+unsigned int vobsub_rgb_to_yuv(unsigned int rgb)
+{
+    int r, g, b, y, u, v;
+    r = rgb >> 16 & 0xff;
+    g = rgb >> 8 & 0xff;
+    b = rgb & 0xff;
+    y = round(( 0.299   * r + 0.587   * g + 0.114   * b) * 219 / 255 + 16);
+    u = round((-0.16874 * r - 0.33126 * g + 0.5     * b) * 224 / 255 + 128);
+    v = round(( 0.5     * r - 0.41869 * g - 0.08131 * b) * 224 / 255 + 128);
+    return y << 16 | u << 8 | v;
+}
+
 static int
 vobsub_parse_palette(vobsub_t *vob, const char *line)
 {
@@ -864,7 +876,6 @@
 {
     //colors: XXXXXX, XXXXXX, XXXXXX, XXXXXX
     unsigned int n, tmp;
-    int r, g, b, y, u, v;
     n = 0;
     line += 40;
     while(1){
@@ -877,13 +888,7 @@
 	if (p - line !=6)
 	    return -1;
 	tmp = strtoul(line, NULL, 16);
-	r = tmp >> 16 & 0xff;
-	g = tmp >> 8 & 0xff;
-	b = tmp & 0xff;
-	y = av_clip_uint8( 0.1494  * r + 0.6061 * g + 0.2445 * b);
-	u = av_clip_uint8( 0.6066  * r - 0.4322 * g - 0.1744 * b + 128);
-	v = av_clip_uint8(-0.08435 * r - 0.3422 * g + 0.4266 * b + 128);
-	vob->cuspal[n++] = y << 16 | u << 8 | v;
+	vob->cuspal[n++] = vobsub_rgb_to_yuv(tmp);
 	if (n==4)
 	    break;
 	if(*p == ',')
Index: vobsub.h
===================================================================
--- vobsub.h	(revision 25320)
+++ vobsub.h	(working copy)
@@ -17,6 +17,8 @@
 
 /// Convert palette value in idx file to yuv.
 unsigned int vobsub_palette_to_yuv(unsigned int pal);
+/// Convert rgb value to yuv.
+unsigned int vobsub_rgb_to_yuv(unsigned int rgb);
 
 extern void *vobsub_out_open(const char *basename, const unsigned int *palette, unsigned int orig_width, unsigned int orig_height, const char *id, unsigned int index);
 extern void vobsub_out_output(void *me, const unsigned char *packet, int len, double pts);