Here are a free set of 24 macros that will give you two variants (of differing strength) on each of the 12 primary, secondary and tertiary colours. Each macros strengthens and spreads a single colour (hence the term ‘monadic’). You can click one macro after another to try them out one after another. In the controls given, ‘Rotate’ and ‘Shift’ adjust colour and ‘Strength’ adjusts Opacity (try them out!).
The download pages for the macros (including more information on them) is here: http://changingminds.org/disciplines/photography/affinity_photo/resources/daves_sc_grading_monadic.htm
Note: At the time of production, if you run a macro when a group is selected, the group will be rasterized (turned into a pixel layer), which can be a real problem. This bug has been reported and may get fixed in future. In the mean time, if you have a group that this macro creates selected (is blue), click Select/Deselect Layers before running another macro.
For related videos, see here: http://changingminds.org/disciplines/photography/affinity_photo/youtube_videos/698_free_monadic_grading_macros.htm#see
There are now online pages for InAffinity here: https://changingminds.org/disciplines/photography/affinity_photo/affinity_photo.htm
Free resources, including macros, palettes, etc. are here:
If you are a beginner, start here:
There is a full, cross-referenced index for every video here: https://changingminds.org/disciplines/photography/affinity_photo/inaffinity_video_index.htm
To find videos by date of publication, start here: https://changingminds.org/disciplines/photography/affinity_photo/ap_time-sorted.htm
To find videos by subject, start here: https://changingminds.org/disciplines/photography/affinity_photo/categories/ap_categories_alphabetic.htm
The web page for this video is here: http://changingminds.org/disciplines/photography/affinity_photo/youtube_videos/698_free_monadic_grading_macros.htm