Custom brush troubleshooting

[qaman333]

I have created custom image brushes (both in black and in white) on a transparent background. 
Using the Paint Brush Tool, they paint ONLY in the color they were created (black or white). I am unable to change them so they would pain in any other color.  All other brushes, do change color as expected.
How can I correct this so I can use the custom brushes with other colors? What am I doing wrong?

Mac OS 10.13.6, Affinity Photo 1.6.7

[Lee D]

If you've created a brush based on an image, when painted it will be the colour the original image was. If you've created one from shapes for example, use the Intensity Brush option instead.

[agcphoto]

I made a logo that was black, and one that was white, using the custom image brush option. They worked fine, but as you say, they will not change colour. I made one using the "Intensity Brush" option, and there appears to be a brush, but it doesn't do anything in AP, no matter how much I click and/or drag... I am using the desktop version of AP and AD, latest stable version. Thanks.

I have made similar brushes in Photoshop, and they work fine. I would like to get this figured out for myself. This is becoming a waste of my time.

[v_kyr]

See for example:

• A Basic Guide to Creating Custom Brushes (including the diff between intensity brushes and image brushes)