Red has been turned to white, now how do I turn blue to black?

I have written a new loop next to the first loop but it does not work.

if image is all blue
    red = 0x00
    blue = 0x00
    green = 0x00

Update: I have written this code and all I get is an error message.

        if(triple.rgbtBlue < 0xff0000 || triple.rgbtBlue > 0x000000)
        {
            triple.rgbtRed = 0x00;
            triple.rgbtBlue = 0x00;
            triple.rgbtGreen = 0x00;
        }

Red has been turned to white, now how do I turn blue to black?

I have written a new loop next to the first loop but it does not work.

if image is all blue
    red = 0x00
    blue = 0x00
    green = 0x00

Update: I have written this code and all I get is an error message.

        if(triple.rgbtBlue < 0xff0000 || triple.rgbtBlue > 0x000000)
        {
            triple.rgbtRed = 0x00;
            triple.rgbtBlue = 0x00;
            triple.rgbtGreen = 0x00;
        }

Update 2: I have changed the code and now almost everything turns black. What am I doing wrong?

        if(triple.rgbtRed == 0xff)
        {
            triple.rgbtRed = 0xff;
            triple.rgbtBlue = 0xff;
            triple.rgbtGreen = 0xff;
        }
        if(triple.rgbtBlue == 0xff)
        {
            triple.rgbtRed = 0x00;
            triple.rgbtBlue = 0x00;
            triple.rgbtGreen = 0x00;
        }

Red has been turned to white, now how do I turn blue to black?

I have written a new loop next to the first loop but it does not work.

if image is all blue
    red = 0x00
    blue = 0x00
    green = 0x00

Red has been turned to white, now how do I turn blue to black?

I have written a new loop next to the first loop but it does not work.

if image is all blue
    red = 0x00
    blue = 0x00
    green = 0x00

Update: I have written this code and all I get is an error message.

        if(triple.rgbtBlue < 0xff0000 || triple.rgbtBlue > 0x000000)
        {
            triple.rgbtRed = 0x00;
            triple.rgbtBlue = 0x00;
            triple.rgbtGreen = 0x00;
        }