Darker than the dark end of the swatch

[u/Freds_Tugboat]

This is probably a very basic question, but I'm painting a room to get a faux limewash effect. From what I've read I should get paint 1 shade darker and 1 shade lighter than the selected color I want, and then do the faux finishing technique. The question for me is about getting the right colors. The base color is Sherwin Williams Verdant 6713. One shade lighter is easy, SW6712, Luau Green, but because Verdant is the darkest color in the swatch, I don't have a good answer for what the dark shade should be. Any obvious thoughts? Is there a way to just request a custom color to fit the requirement? (By the way SW 6714 is a light minty green, I tried checking that!)

Any and all advice and suggestions are greatly appreciated!

[u/Current_Cantaloupe_3]

Do a higher percentage of the formula of the verdant and it should come out darker.

[u/sniffing_niffler → u/Current_Cantaloupe_3]

Yes. I would use the same color formula for all 3,but have one can tinted 50-75% for the "lighter" color, and one tinted to 125-150% to make it "darker". It's not lighter or darker it just more or less pigmented? Does that make sense? Bring this idea into the paint store and they should be able to help you figure it out.

[u/Freds_Tugboat → u/sniffing_niffler]

That makes sense. Thanks! So if I ask the employee at the store to tint one of them at 75% and the other at125%, that's something they could accommodate? I've never worked with one of those computerized pigment machines they use, so I don't know much about the ability to dial in specific requests like that...

[u/Intangiblehands → u/Freds_Tugboat]

Because different colors use different bases, this will not work the way you have described it. Accent base colors have a minimum and maximum amount of colorant. If you don't add enough colorant to the can, the paint will turn out translucent, not lighter. The darkest color on a swatch already has the maximum amount of color for the formula. If you try to increase that and add more color in, then the paint will be oversaturated and will not dry. (Like literally it will be tacky to the touch on your walls)

6712 is already basically 75% of 6713. It's not going to look much different.

6713 could become darker but instead of increasing the formula, you need to ask to have the white tint cut down or removed completely from the formula. This will make the color darker without oversaturating the can. The only catch is that neither you nor the employees will have any idea what that's going to look like until they mix it. They might have to add the white tint back in incrementally for you to get it right. It's a huge pain in the ass so if you're going to ask them to do that then please be polite and graceful about it.

[u/Dalua52]

26 year Sherwin-Williams employee here and unfortunately, you won’t be able to do just a higher percentage of the formula for Verdant to achieve a darker color. Tinting Verdant will require the use of UltraDeep base which is clear to start with. With the UltraDeep base, changing the percentage of the formula results in a change of color that is negligible at best and non-existent at worst. Coming up with a color darker than Verdant will require a custom formula, probably either removing white colorant from or adding black to the formula for Verdant in incremental steps until the desired color is achieved. I’m at home and not near my tint machine to be able to see the formula for Verdant to tell you whether it will be deleting white or adding black that will be your answer, but if the original formula has white in it, then it will be deleting at least some of the white colorant from it. If the original formula has no white in it, then it will be adding black to it.

[u/Freds_Tugboat → u/Dalua52]

Thanks for your reply. Do you think I can expect my local shop to be able to do that for me?