92 matte colors, the modeling workhorse half of Tamiya's acrylics.
Tamiya Color XF, the flat line
Tamiya Color XF is the flat, matte counterpart to the glossy X range, and at 92 colors it is by far the larger and more used of the two. This is the range scale modelers actually live in: matte finishes that suit realistic subjects, and a palette weighted heavily toward the greys, browns, and muted greens that military modeling demands. Greys alone make up more than a third of the range.
That weighting is the whole story. Rows of near-identical greys and earth tones look redundant until you are matching a specific aircraft or armor scheme, at which point the precision is exactly why modelers trust Tamiya. The range covers the standard camouflage and interior colors for tanks, planes, and ships far more thoroughly than it covers bright hobby color, of which there is deliberately little.
Like the rest of Tamiya's acrylics, XF is alcohol-based and sprays exceptionally well, which is why so many armor and aircraft builders airbrush their whole models in it. For brush work it can be less forgiving, drying fast and matte, so thinning and technique matter more than with a miniature-first range.