Contrast control flat icons with outlines - Stock vector

contrast, fade, fading, contrary, inverse, converse, antithesis, conflicting, contradictory, antagonistic, antithetical, oppose, transition, slur, more, less, intensity, adjust, control, tool, settings, change, icons, set, flat, buttons, application, round, circles, frames, outlines, strokes, design, template, user-interface, element, vector, illustration, symbol, plain, simple, white, green, red, yellow, blue, brown, magenta, mustard, gray