Answers.Body: <p>Set an adjustment layer, mask it to cover what you want, use the Hue/Saturation color effect, and set the saturation to zero...then on your layer push the e key, and then select the stop watch next to the saturation of the effect. go to where you want it in color, and set the saturation amount.  Done</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-23T08:58:49.690Z
Answers.LastActivityDate: 2013-03-23T08:58:49.690Z
Answers.UserDisplayName: Chris James Champeau
Answers.Body: <p>I can't give you AE specifics, but one general method would be to have a mono layer and an otherwise identical color layer, keying the color over the mono using a matte layer that you draw on. As portions of the matte layer are turned white, or shades of white, the color layer is revealed.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-22T21:56:21.440Z
Answers.LastActivityDate: 2013-03-22T21:56:21.440Z
Answers.UserDisplayName: Jim Mack
Body: <p>I'm rather new to AE but I believe I have the rotoscoping under control.
  How can I gradually (each frame more) colourize an object in a video. So that at first the whole video is black and white and then one object starts to get more and more colour starting from a certain point and allow the colour to spread back to the whole object.</p>
  
  <p>Thanks a lot!</p>
  
Tags: <after-effects>
Title: How to gradually colourize an object in after effects
UserDisplayName: Ilya Karnaukhov
ThreadText: # How to gradually colourize an object in after effects
  
  (Asked by: username_0 on 2013-03-22)
  
  I'm rather new to AE but I believe I have the rotoscoping under control.
  How can I gradually (each frame more) colourize an object in a video. So that at first the whole video is black and white and then one object starts to get more and more colour starting from a certain point and allow the colour to spread back to the whole object.
  
  Thanks a lot!
  
  **Tags:** after-effects
  
  
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  ## 2 answers
  
  ### Answer by username_2 on 2013-03-22. Score: 3 | Accepted answer
  
  I can't give you AE specifics, but one general method would be to have a mono layer and an otherwise identical color layer, keying the color over the mono using a matte layer that you draw on. As portions of the matte layer are turned white, or shades of white, the color layer is revealed.
  
  
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  ### Answer by username_1 on 2013-03-23. Score: 2
  
  Set an adjustment layer, mask it to cover what you want, use the Hue/Saturation color effect, and set the saturation to zero...then on your layer push the e key, and then select the stop watch next to the saturation of the effect. go to where you want it in color, and set the saturation amount. Done
  
  
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