The Effects - color nodes allow you to adjust the colors of the texture input. 

    • Adjust brightness
    • Adjust color balance
    • Adjust contrast
    • Adjust exposure
    • Adjust hue
    • Adjust lightness
    • Adjust saturation
    • Adjust saturation (HSL)
    • Adjust white balance
    • Apply gamma curve
    • Apply gradient map
    • Apply LUT
    • Convert to grayscale

Figure 1: Octane Texture Layer - Effects - color Node List