Sam f96ef33856
FIX: dominant color not working for 16bit images (#20300)
16 bit images were not returning the correct dominant color due truncation

The routine expected an 8bit color eg: #FFAA00, but ended up getting a 16bit one eg: #FFFAAA000. This caused a truncation, which leads to wildly off colors.
2023-02-15 12:41:04 +11:00
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