# Applying colors on shared vertices

int x = 100;
int y = 100;
int width = 250;
int height = 250;
int border = 10;

``````int top     = y + border;
int bottom  = y + height;
int left    = x + border;
int right   = x + width;

static int vertices[] = {
x,                  y,                             //0
right,              y,                            //1
right,              bottom,                    //2
x,                  bottom,                     //3

left,               top,                          //4
right - border,     top,                       //5
right - border,     bottom - border,      //6
left,               bottom - border,         //7

left,               top + (height - border - border) * 0.5,
right - border,     top + (height - border - border) * 0.5
};

static unsigned int indices[] = {
0, 1, 4, 5, //top border
5, 1, 6, 2, //right border
2, 6, 3, 7, //bottom border
7, 4, 3, 0, //left border

4, 5, 8, 9,
8, 9, 7, 6,
};

static unsigned char colors[] = {
0x00, 0x00, 0x00,
0x00, 0x00, 0x00,
0x00, 0x00, 0x00,
0x00, 0x00, 0x00,

0xff, 0x00, 0x00,
0xff, 0x00, 0x00,
0xff, 0x00, 0x00,
0xff, 0x00, 0x00,

0x00, 0xff, 0x00,
0x00, 0xff, 0x00,
0x00, 0xff, 0x00,
0x00, 0xff, 0x00,

0x00, 0x00, 0xff,
0x00, 0x00, 0xff,
0x00, 0x00, 0xff,
0x00, 0x00, 0xff,
};
``````

My current undesired output:

<error>

Is it possible to apply a single color on a single quad in this kind of implementation?

Strictly each vertex has only has one set of data including colour; you can repeat a vertex position and have a different colour for each repetition.