Is that the same color...just a lighter version?

Essentially, yes. Sweet Spring is also slight more neutral/grayer than Paris Rain.

Thank you so much for your quick reply!! So what you are saying is that if I lighten Paris Rain by a certain % to bring LRV up 10 points, I will be left with basically Sweet Spring?

you are saying is that if I lighten Paris Rain by a certain % to bring LRV up 10 points, I will be left with basically Sweet Spring?

Nope. 🙂

Question is why not just use Sweet Spring?

There is no way to correlate an ambiguous % to a paint color's attributes - like LRV.

Because the question is a % of what exactly? From there it's - possibly - a matter of math provided quantities of colorant are large enough to be cut.

I know it sounds logical and every blogger on the internet infers that this is how paint color works.

In actual application, across thousands of paint colors, multiple brands I can tell you that is not how it works.

When you alter a formula, you change all 3 dimensions: hue, value and chroma.

Not just the part you don't like or want to change. In this case, lightness.

Essentially it's a new color.

Can't know what part of the color will change - or by how much - unless you have it mixed, let it dry and look at it, measure it.

At that point you own the can of paint whether you like it or not.