edo pattern-samekomon #2271
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The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.

Source Yamachem

 More Textures
Prismatic Geometric Tessellation Pattern 3 No Background@2X #556
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Prismatic Geometric Tessellation Pattern 3 No Background

Source GDJ

Prismatic Dots Background 3@2X #506
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Prismatic Dots Background 3

Source GDJ

Background pattern 1 #220
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A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.

Source Firkin

Prismatic Hypnotic Pattern 2 No Background@2X #574
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Prismatic Hypnotic Pattern 2 No Background

Source GDJ

Diamond pattern (colour 2) #2284
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From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

Diamond pattern 2 (colour 4) #2265
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From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

Background pattern 309 (colour 4) #1863
 Green  CC 0

Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.

Source Firkin