Add color converter test program

.gitignore

@@ -1 +1,2 @@
 1555ColorPicker.html
+ColorConverter/*.exe

ColorConverter/ColorConvert.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdint.h>
+
+int main(void) {
+    unsigned int color;
+    unsigned int red;
+    unsigned int green;
+    unsigned int blue;
+    printf("Enter RGB565 value: ");
+    scanf("%x", &color);
+    red = ((((color >> 11) & 0x1F) * 527) + 23) >> 6;
+    green = ((((color >> 5) & 0x3F) * 259) + 33) >> 6;
+    blue = (((color & 0x1F) * 527) + 23) >> 6;
+    printf("Red: %d\n", red);
+    printf("Green: %d\n", green);
+    printf("Blue: %d\n", blue);
+    uint32_t rgbHex = red << 16 | green << 8 | blue;
+    printf("Hex: %x\n", rgbHex);
+    uint16_t rgb565 = ((red & 0xF8) << 8) | ((green & 0xFC) << 3) | (blue >> 3);
+    printf("RGB565 value: %x", rgb565);
+    return 0;
+}