Grease Pencil 2.8, lineart color changes when rendering with EEVEE

Hi, friends ! There is something very weird happening with EEVEE render. i’m trying to render a scene where some greasepencil objects are drawn over pure white objects and background. As if it was on paper. On the preview, in render shading or whatever, the dark and light colors are showing correcty. Now when rendering, only the dark strokes “survives”, and the light ones seems to melt in the white background. I made some test with darker background, and the result is that then light strokes did

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