show one's true colors

:  to cause or permit to be seen :  exhibit

:  to offer for sale

:  to present as a public spectacle :  perform

:  a demonstrative display

:  outward appearance

:  a false semblance :  pretense

:  being in accordance with the actual state of affairs

:  conformable to an essential reality

:  fully realized or fulfilled

:  in accordance with fact or reality

:  without deviation

:  without variation from type

:  truth, reality

:  to make level, square, balanced, or concentric :  bring or restore to a desired mechanical accuracy or form

:  a phenomenon of light (such as red, brown, pink, or gray) or visual perception that enables one to differentiate otherwise identical objects

:  the aspect of the appearance of objects and light sources that may be described in terms of hue, lightness, and saturation (see saturation 4) for objects and hue, brightness, and saturation for light sources

:  a specific combination of hue, saturation, and lightness or brightness

:  to give color to

:  to change the color of (as by dyeing, staining, or painting)

:  to change as if by dyeing or painting: such as