I have the following image with a transparent background:
I would like to convert it to just a single colour, but for it to fade to transparent rather than to different tints of the same colour. A bit like the below — I understand this is an illustration and not a photo, but it should give you the idea:
I've tried a duotone / monotone image with blue, but that gives me blue and white... not blue and transparent:
I've also tried setting the image as a bitmap with diffusion dither. This gives me just one colour (as I'd like it) but it looks really noisey and poor quality:
Is there a better way of doing this?