Why is one color missing?

[zt1514]

The original 24 x24 pixel image is as follows:

After executing w4 run cart.wasm, the displayed image is as follows:

I executed w4 png2src demo.png --as and copied the code into main.ts as follows:

import * as w4 from "./wasm4";

const demoWidth = 24;
const demoHeight = 24;
const demoFlags = 1; // BLIT_2BPP
const demo = memory.data<u8>([0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0x80, 0x00, 0x1a, 0x90, 0x00, 0x02, 0x80, 0x00, 0x1a, 0x90, 0x00, 0x02, 0x80, 0x00, 0x15, 0x50, 0x00, 0x02, 0x80, 0x00, 0x15, 0x50, 0x00, 0x02, 0x80, 0x00, 0x3f, 0xf0, 0x00, 0x02, 0x80, 0x00, 0x3f, 0xf0, 0x00, 0x02, 0x80, 0x00, 0x3f, 0xf0, 0x00, 0x02, 0x80, 0x00, 0x3f, 0xf0, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x02, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa]);
export function update(): void {
    w4.blit(demo, 0, 0, demoWidth, demoHeight, demoFlags);
}

The color of the pixel where blue should appear is not displayed.
Did I make a mistake in my operation?

[zt1514]

The four colors in original 24 x24 pixel image are :
#FFFFFF – White
#FF0000 – Red
#00FF00 – Green
#0000FF – Blue

[aduros]

You may have to set DRAW_COLORS so that none of the 4 nibbles are 0 (transparent).