yellowish green, coarse mesh linen
綟 centers on a specific yellowish-green color and a type of coarse mesh linen, likely named for its hue. The two meanings are linked by the material's characteristic color.
綟 combines 糸 (thread, textile) with 戾, which likely contributes the sound. The character originally referred to a specific greenish-yellow silk or linen fabric.
The left side 糸 suggests thread or cloth, and the right side 戾 looks like a twisted, coarse weave. Picture a bolt of rough linen in a distinct yellowish-green shade.
For レイ, imagine laying out a length of this yellowish-green linen: lay -> レイ, and the cloth's color is unmistakable.
hemp yarn or linen thread woven into a coarse cloth used for mosquito nets, summer clothes, etc.