diff --git a/img2cpi.c b/img2cpi.c
index 4f66bc3..f2da4e4 100644
--- a/img2cpi.c
+++ b/img2cpi.c
@@ -23,9 +23,15 @@ struct cc_char {
   unsigned char character;
   unsigned char bg, fg;
 };
+struct palette {
+  const uint8_t count;
+  union color colors[] __attribute__((counted_by(count)));
+};
+#define LENGTHOF(...) (sizeof(__VA_ARGS__) / sizeof(*(__VA_ARGS__)))
+#define PALETTE(...) { .count = LENGTHOF((union color[]){__VA_ARGS__}), .colors = {__VA_ARGS__} }
 
 const extern char font_atlas[256][11];
-const extern union color DEFAULT_PALETTE[16], DEFAULT_GRAY_PALETTE[16];
+const extern struct palette DEFAULT_PALETTE, DEFAULT_GRAY_PALETTE;
 
 struct arguments {
   bool fast_mode;
@@ -76,8 +82,7 @@ struct image {
 struct image_pal {
   int w, h;
   uint8_t *pixels;
-  const union color *palette;
-  size_t palette_size;
+  const struct palette *palette;
 };
 
 bool parse_cmdline(int argc, char **argv);
@@ -85,7 +90,7 @@ void show_help(const char *progname, bool show_all, FILE *fp);
 struct image *image_load(const char *fp);
 struct image *image_new(int w, int h);
 struct image *image_resize(struct image *original, int new_w, int new_h);
-struct image_pal *image_quantize(struct image *original, const union color *colors, size_t n_colors);
+struct image_pal *image_quantize(struct image *original, const struct palette *palette);
 float get_color_difference(union color a, union color b);
 float get_color_brightness(union color clr);
 void image_unload(struct image *img);
@@ -163,10 +168,10 @@ int main(int argc, char **argv) {
   }
 
   // TODO: load palette, maybe calculate it too? k-means?
-  const union color *palette = DEFAULT_PALETTE;
+  const struct palette *palette = &DEFAULT_PALETTE;
   switch (args.palette_type) {
-    case PALETTE_DEFAULT: palette = DEFAULT_PALETTE; break;
-    case PALETTE_DEFAULT_GRAY: palette = DEFAULT_GRAY_PALETTE; break;
+    case PALETTE_DEFAULT: palette = &DEFAULT_PALETTE; break;
+    case PALETTE_DEFAULT_GRAY: palette = &DEFAULT_GRAY_PALETTE; break;
     case PALETTE_AUTO: assert(0 && "Not implemented"); break;
     case PALETTE_LIST: assert(0 && "Not implemented"); break;
     case PALETTE_PATH: assert(0 && "Not implemented"); break;
@@ -198,7 +203,7 @@ int main(int argc, char **argv) {
   // TODO: actually do stuff
   struct cc_char *characters = calloc(args.width * args.height, sizeof(struct cc_char));
 
-  struct image_pal *quantized_image = image_quantize(canvas, palette, 16);
+  struct image_pal *quantized_image = image_quantize(canvas, palette);
   if (!quantized_image) {
     fprintf(stderr, "Error: failed to open the file\n");
     return EXIT_FAILURE;
@@ -217,9 +222,9 @@ int main(int argc, char **argv) {
   fputc(args.height, fp);
   fputc(0x00, fp);
   for (int i = 0; i < 16; i++) {
-    fputc(palette[i].rgba.r, fp);
-    fputc(palette[i].rgba.g, fp);
-    fputc(palette[i].rgba.b, fp);
+    fputc(palette->colors[i].rgba.r, fp);
+    fputc(palette->colors[i].rgba.g, fp);
+    fputc(palette->colors[i].rgba.b, fp);
   }
   for (int i = 0; i < args.width * args.height; i++) {
     fputc(characters[i].character, fp);
@@ -486,19 +491,18 @@ void get_size_keep_aspect(int w, int h, int dw, int dh, int *ow, int *oh)
   }
 }
 
-struct image_pal *image_quantize(struct image *original, const union color *colors, size_t n_colors) {
+struct image_pal *image_quantize(struct image *original, const struct palette *palette) {
   struct image_pal *out = calloc(1, sizeof(struct image_pal));
   out->w = original->w;
   out->h = original->h;
   out->pixels = calloc(original->w, original->h);
-  out->palette = colors;
-  out->palette_size = n_colors;
+  out->palette = palette;
 
   for (int i = 0; i < out->w * out->h; i++) {
     int closest_color = 0;
     float closest_distance = 1e20;
-    for (int color = 0; color < n_colors; color++) {
-      float dist = get_color_difference(colors[color], original->pixels[i]);
+    for (int color = 0; color < palette->count; color++) {
+      float dist = get_color_difference(palette->colors[color], original->pixels[i]);
       if (dist <= closest_distance) {
         closest_distance = dist;
         closest_color = color;
@@ -531,7 +535,7 @@ void convert_2x3(const struct image_pal *img, struct cc_char *characters) {
       for (int oy = 0; oy < 3; oy++) {
         for (int ox = 0; ox < 2; ox++) {
           unsigned char pix = img->pixels[ox + (x + (y * 3 + oy) * w) * 2];
-          float brightness = get_color_brightness(img->palette[pix]);
+          float brightness = get_color_brightness(img->palette->colors[pix]);
           if (brightness >= brightest_diff) {
             brightest_i = pix;
             brightest_diff = brightness;
@@ -549,8 +553,8 @@ void convert_2x3(const struct image_pal *img, struct cc_char *characters) {
         for (int ox = 0; ox < 2; ox++) {
           if (ox == 1 && oy == 2) continue;
           unsigned char pix = img->pixels[ox + (x + (y * 3 + oy) * w) * 2];
-          float diff_bg = get_color_difference(img->palette[darkest_i], img->palette[pix]);
-          float diff_fg = get_color_difference(img->palette[brightest_i], img->palette[pix]);
+          float diff_bg = get_color_difference(img->palette->colors[darkest_i], img->palette->colors[pix]);
+          float diff_fg = get_color_difference(img->palette->colors[brightest_i], img->palette->colors[pix]);
           if (diff_fg < diff_bg) {
             bitmap |= pixel_bits[oy][ox];
           }
@@ -559,8 +563,8 @@ void convert_2x3(const struct image_pal *img, struct cc_char *characters) {
 
       {
         unsigned char pix = img->pixels[1 + (x + (y * 3 + 2) * w) * 2];
-        float diff_bg = get_color_difference(img->palette[darkest_i], img->palette[pix]);
-        float diff_fg = get_color_difference(img->palette[brightest_i], img->palette[pix]);
+        float diff_bg = get_color_difference(img->palette->colors[darkest_i], img->palette->colors[pix]);
+        float diff_fg = get_color_difference(img->palette->colors[brightest_i], img->palette->colors[pix]);
         if (diff_fg < diff_bg) {
           bitmap ^= 31;
           unsigned char tmp = darkest_i;
@@ -579,9 +583,9 @@ void convert_2x3(const struct image_pal *img, struct cc_char *characters) {
 void convert_8x11(const struct image_pal *img, struct cc_char *characters) {
   int w = img->w / 8, h = img->h / 11;
   float palette_self_diffs[0x100][0x10] = {{(float) 0xffffff}};
-  for (int input_color = 0x0; input_color < 0x100 && input_color < img->palette_size; input_color++) {
-    for (int output_color = 0x0; output_color < 0x10 && output_color < img->palette_size; output_color++) {
-      palette_self_diffs[input_color][output_color] = get_color_difference(img->palette[input_color], img->palette[output_color]);
+  for (int input_color = 0x0; input_color < 0x100 && input_color < img->palette->count; input_color++) {
+    for (int output_color = 0x0; output_color < 0x10 && output_color < img->palette->count; output_color++) {
+      palette_self_diffs[input_color][output_color] = get_color_difference(img->palette->colors[input_color], img->palette->colors[output_color]);
     }
   }
 
@@ -593,7 +597,7 @@ void convert_8x11(const struct image_pal *img, struct cc_char *characters) {
           uint8_t pixel_unresolved = img->pixels[
             ox + (x + (y * 11 + oy) * w) * 8
           ];
-          for (int color = 0x0; color < 0x10 && color < img->palette_size; color++) {
+          for (int color = 0x0; color < 0x10 && color < img->palette->count; color++) {
             chunk_palette_diffs[ox][oy][color] = palette_self_diffs[pixel_unresolved][color];
           }
         }
@@ -628,7 +632,7 @@ void convert_8x11(const struct image_pal *img, struct cc_char *characters) {
   }
 }
 
-const union color DEFAULT_PALETTE[16] = {
+const struct palette DEFAULT_PALETTE = PALETTE(
   { { 0xf0, 0xf0, 0xf0, 0xff } },
   { { 0xf2, 0xb2, 0x33, 0xff } },
   { { 0xe5, 0x7f, 0xd8, 0xff } },
@@ -645,7 +649,7 @@ const union color DEFAULT_PALETTE[16] = {
   { { 0x57, 0xa6, 0x4e, 0xff } },
   { { 0xcc, 0x4c, 0x4c, 0xff } },
   { { 0x11, 0x11, 0x11, 0xff } }
-}, DEFAULT_GRAY_PALETTE[16] = {
+), DEFAULT_GRAY_PALETTE = PALETTE(
   { { 0xf0, 0xf0, 0xf0, 0xff } },
   { { 0x9d, 0x9d, 0x9d, 0xff } },
   { { 0xbe, 0xbe, 0xbe, 0xff } },
@@ -662,7 +666,7 @@ const union color DEFAULT_PALETTE[16] = {
   { { 0x6e, 0x6e, 0x6e, 0xff } },
   { { 0x76, 0x76, 0x76, 0xff } },
   { { 0x11, 0x11, 0x11, 0xff } }
-};
+);
 
 const char font_atlas[256][11] = {
   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },