Satin Weave@2X #1045
Light CC BY-SA 3.0Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
More Textures
Brilliant #753
Light CC BY-SA 3.0This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Debut Dark@2X #1015
Dark CC BY-SA 3.0Same classic 45-degree pattern, dark version.
Source Luke McDonald
Absurdity #825
Light CC BY-SA 3.0Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Background pattern 232 #2297
Dark CC 0Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Prismatic Floral Background No Black #475
Light CC 0Prismatic Floral Background No Black
Source GDJ
Background pattern 252 #2162
Dark CC 0Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 4 #271
Noise CC 0Prismatic Abstract Geometric Background 4
Source GDJ
First Aid Kit #701
Fabric CC BY-SA 3.0No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Grunge Wall #81
Wall CC BY-SA 3.0Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Subtle Grunge@2X #1041
Light CC BY-SA 3.0A heavy hitter at 400x400px, but lovely still.
Source Breezi
Colorful Floral Background 3 No Black #485
Light CC 0Colorful Floral Background 3 No Black
Source GDJ
Pink Clouds Background #1230
Pink CC BY-SA 3.0Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Lichen #1293
Stone CC 0Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Subtle Website Background #1022
Stone CC BY-SA 3.0Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Aged Paper Background Tile #1074
Paper CC BY-SA 3.0A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
Retro Circles Background 5 No Black@2X #427
Noise CC 0Retro Circles Background 5 No Black
Source GDJ
Reticular Tissue #763
Light CC BY-SA 3.0The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Floral design 100 (version 2) #1773
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Red Gemstone Tiles #1223
Red CC BY-SA 3.0This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen