So here you go, swatches. The names are really cutesy, ranging from Lighter than Light (which honestly isn't THAT light), to Light, and then it starts getting uncreative - Light-Medium, Medium, and the really inexplicably named Mid-Medium.
The texture of the Timebalm concealers is pretty smooth and decent, without being over-emollient. Pigmentation is also very decent, each of these swatches being 2 - 3 stripes - that's total opacity with 2 - 3 swipes of product. Overall, a not too shoddy product. Not bad at all. They also seem to be getting a lot of love in general, so I guess it's worth trying out, if you can find one in your colour.
Lighter than Light is a very pink-toned pale flesh colour, that I would guess is probably NW15 or NW10? I'm not too familiar with the NW colours.
Light is neutral-to-cool-toned pale flesh colour that, but not as pale as Lighter than Light.
Light-Medium is a hair darker than NC20 (that's my colouring), and is yellow-undertoned. It's definitely similar to NC20.
Medium is what I'm guesing NC25 would be, although I don't really know. Also slightly yellow-toned, athough I think it's neutral enough.
Mid-Medium is a neutral-undertoned flesh shade, although it might just veer towards yellow undertones.
The good thing about the TimeBalm concealers is that most of them, with the exception of Lighter than Light, have pretty more-or-less neutral undertones. Sure, each individual veers slightly towards warm or cool, but they're all close enough to neutral to be wearable for most people.