Colors calculations seem off?

For example, the Color-Brand 050-900 seems off. My primary color is #154CD8. The 100, for example, looks more gray (no blue hue). The second image seems to flow better. These are handled by "calc" statements, but I do not understand how the values are chosen. It appears the "calc" statements are generic; I asked Claude to give me calc for two colors, and they are different calc values.

'100': hsl(from #154CD8 calc(h + 9.6) calc(s + 13.07) calc(l + 45.1))
'100': hsl(from #FFD166 calc(h + 9.6) calc(s + 0) calc(l + 25.28))

I am looking for understanding, and this is not a criticism.