Index: libmpdemux/demux_mkv.c
===================================================================
--- libmpdemux/demux_mkv.c	(revision 25278)
+++ libmpdemux/demux_mkv.c	(working copy)
@@ -347,7 +348,7 @@
 static int
 vobsub_parse_custom_colors (sh_sub_t *sh, const char *start)
 {
-  int use_custom_colors, i;
+  int use_custom_colors, i, r, g, b, y, u, v, tmp;
 
   use_custom_colors = 0;
   start += 14;
@@ -366,8 +367,15 @@
          start++;
        for (i = 0; i < 4; i++)
          {
-           if (sscanf(start, "%06x", &sh->colors[i]) != 1)
+           if (sscanf(start, "%06x", &tmp) != 1)
              break;
+           r = tmp >> 16 & 0xff;
+           g = tmp >> 8 & 0xff;
+           b = tmp & 0xff;
+           y = RGB_TO_Y_CCIR(r, g, b);
+           u = RGB_TO_U_CCIR(r, g, b, 0);
+           v = RGB_TO_V_CCIR(r, g, b, 0);
+           sh->colors[i] = y << 16 | u << 8 | v;
            start += 6;
            while ((*start == ',') || isspace(*start))
              start++;