Dyed example: 28ct monaco & 28ct opal lugana
Closest DMC match: shades of 3813
Linen will always dye darker/more vibrant than any cross stitch fabric, then aida (14ct darkest, 20ct, 16ct, & 18ct dyeing lightest), followed by evenweave fabrics (usually not 100% natural fiber) dyeing the lightest. All opals will dye about 10% lighter because of the opalescent thread woven through it.
Sized fabric may dye lighter or a slightly different color. The following is the sized fabric - 16ct opal, 20ct opal, 25ct lugana, 27ct linda, 36ct linen, 40ct linen, & 40ct verdal (lugana).
Sizes are prior to dyeing. There will be some shrinkage during the dyeing process.