Hi Jen!
Though I sent an email thanking you, I haven't responded to your comments on this board. Thank-you for the initial advice! So here are how things worked, for reference, and... since I have more questions!:
JenW wrote:
I would try Ebony with Pink Booster. Samples will still be your best bet as you are testing the formula as much as you are working on the color. The refill is 1 tablespoon of powder. Peach is red plus yellow. Ebony is neutral on the cool side, so beige. I am unfamiliar with Alima's color lines. Even though they label it cool, it might not really be all that cool-toned. It might be slightly cool toned. From the pics you emailed to me, I would think Ebony1:about 7 White (depending on which formula you choose) plus a little pink booster. I would try without the pink first. I suggest trying the All Purpose Foundation.
I got the little All-Purpose White starter kit. This is what ended up working after some trials:
I mixed 1 Ebony : 12 White; let's call that P for pink
I also mixed 1 Buttery Gold : 12 White; let's call that Y for yellow
Then I mixed 6 P : 3 Y and still needed to add 3 White,
so that simplified ratio is 2P : 1Y: 1 White
So this is, I think: 2 E : 1 BG : 24+12+13 A-P W
more clearly, 2 scoops Ebony : 1 scoop Buttery Gold : 49 scoops All-Purpose White
Am I right? I don't want to mix up a useless mess with my next order!

Is there a faster way to measure 49 scoops with a teaspoon or tablespoon measure? How much is it? Approximately how many scoops are in a tablespoon? What scaled-up mix could I make with a tablespoon?
What now? First, I'm using a combination of the Ebony and the Buttery Gold as I found that as I added more white, the Ebony base started looking more pink on my skin, and I found that to match my closest true face/neck/chest colour, it looked like I needed a bit of yellow. So would one of the other bases possibly already have this mix, so I might not need to use two? Warm Gold? Olive? I thought I'd ask just in case. If there isn't a clear substitute, I guess this isn't too complicated.
For others' reference, the above mix looks good on me. It also nicely balances or covers excess redness in certain areas of my face. I am trying it as an alternative to Alima's Cool 3 because though that is alright when applied lightly, it does also tend to be a touch dark and over-pink on me, and their next "warmer tone" the Neutral isn't right for me as I need to offset the pink with yellow, not orange or brown, if that makes sense. Hence the benefit of Silk Naturals mixing!
I observe that this foundation has a different characteristic as it settles on my skin (I don't think it necessarily oxidizes, but the mix looks lighter off the skin than on for me; and it certainly looks lighter than other companies' mineral foundations), meaning that I found I needed to add much more white than we originally expected to get a good match. Actually close to double. I don't consider myself that fair, so I was a bit surprised.
How would this mix translate into the Original Formula?
JenW wrote:
Concealers are even more variable than foundations. Unfortunately, I think sampling is your best bet. You may decide powder concealers don't work for you under your eyes. WE do have cream versions you might try. Also, if what you have is working for you, you may want to consider sticking with it. Some even mix up a lighter/heavier coverage shade of their foundation for concealer.
In terms of concealers, I'm not convinced on the sleep in a jar powders for me. I get too much layering leading to a bit of a crepey plastered look. The 2-Light Cream Concealer is OK, but not ideal. I think I need more yellow in it so that "my cream" could act as a corrector to counteract blue and purple in my undereyes. It just doesn't seem to cover/correct enough as is, though it works on other parts of the face. Any suggestions on how I could combine things (I don't know - anyone with luck making their own cream corrector with the heavy foundation plus a moisturizer/serum and some sleep in a jar or something else for yellow?) to make a slightly yellower and lighter cream corrector with your products so I could avoid certain ingredients in the current winner for me? Any mix ratios to suggest for Heavy White : Ebony : Buttery Yellow : Mystery Yellow enhancer : moisturizer/serum based on my foundation tone with the All-Purpose White?
Thank-you for all input on this in advance!