Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
Prismatic Curved Diamond Pattern No Background
Source GDJ
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem