Without more details concerning the unit (even though the 'Eismeer' badge is shown), and the period and location, it's not possible to state exactly what the colours are supposed to be. However, as a general rule, but by no means certain, as there were exceptions, the FW190A-8 in, for example, 1944, would normally be finished in a scheme of the three 'greys' - RLM 74, 75 and 76. But as previously stated, the profile shown is a very basic representation, where it's not possible to determine the colours represented, the pattern, or any mottle pattern applied. To be certain, a more accurate profile would be required, backed up by photo evidence.
As for the paints themselves, most paint ranges, both enamel and acrylic, include the major RLM colours, or they can be mixed by referring to one of the paint conversion charts shown elsewhere on the forum. If your local outlet doesn't stock your preferred brand, then as a suggestion in the USA, Squadron should have paint ranges listed - perhaps a US member could provide further info on this.