Answers.Body: <p>The color of the 2x4 plate and 1x2 jumpers in the photo appears to be regular Dark Blue:  </p>
  
  <p><a href="https://i.sstatic.net/wAK4f.jpg" rel="noreferrer"><img src="https://i.sstatic.net/wAK4f.jpg" alt="enter image description here"></a></p>
  
  <p>The greenish tint you mention is likely discoloration.  Here is an example of a discolored regular blue piece (right) next to a fairly new regular blue piece (left) for comparison:  </p>
  
  <p><a href="https://i.sstatic.net/n6GYf.jpg" rel="noreferrer"><img src="https://i.sstatic.net/n6GYf.jpg" alt="enter image description here"></a>  </p>
  
  <p>How uniform or consistent the discoloraton is depends on the cause and/or whether the piece was assembled when it occurred.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-31T16:30:18.673Z
Answers.Text: I should have included that for comparison, but unfortunately its not.
  Its got a slightly greener tint than dark blue. Do you know if they change the color over time? Its like this on the entire brick, so I assume its not faded.
Answers.UserDisplayName: Zach Turley
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-31T23:48:44.693Z
Answers.Text: @Zach Turley - Based on my experience, blues brick of all shades can turn a dingy greenish color with age, sunlight or excessive heat. The shade of green, of course, depends on the shade of blue.  I have just recently treated some discolored dark blue bricks (among many others) with hydrogen peroxide, heat and a fluorescent light with very good results.  There are a variety of methods using hydrogen peroxide to restore plastic color. A quick Google search will help you find instructions if you're interested.
Answers.UserDisplayName: JohnnyB
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-02T20:38:42.083Z
Answers.Text: Greenish accent on blue bricks appear due to so called "yellowing" process. It happens a lot with older bricks. So they get more of yellow/brown tint over time. I do believe the color you are looking at is Dark Blue [BL]. It is just bricks got yellowed.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-11T17:49:23.793Z
Answers.Text: @JohnnyB Thank you for the update and great answer.  I didn't realize that heat/age would be another factor instead of just sunlight: the bottoms are identical in color to the top, so I believed discoloration was not the case here.
Answers.UserDisplayName: Zach Turley
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-31T04:58:06.297Z
Answers.LastActivityDate: 2019-08-01T02:17:29.573Z
Answers.LastEditDate: 2019-08-01T02:17:29.573Z
Answers.UserDisplayName: JohnnyB
Body: <p>Blue on the left, unknown in the middle, dark turquoise on the right.</p>
  
  <p>It's got a slightly greener tint than dark blue. Do you know if they change the color over time? It's like this on the entire brick, so I assume it's not faded.</p>
  
  <p>I've tried every possible color on Bricklink and a couple color guides, I'm lost.</p>
  
  <p><a href="https://i.sstatic.net/ZajEj.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ZajEj.jpg" alt="enter image description here"></a></p>
  
Tags: <part-identification><colour>
Title: What's this Colour?
UserDisplayName: Zach Turley
ThreadText: # What's this Colour?
  
  (Asked by: username_0 on 2019-07-31)
  
  Blue on the left, unknown in the middle, dark turquoise on the right.
  
  It's got a slightly greener tint than dark blue. Do you know if they change the color over time? It's like this on the entire brick, so I assume it's not faded.
  
  I've tried every possible color on Bricklink and a couple color guides, I'm lost.
  
  [![enter image description here](https://i.sstatic.net/ZajEj.jpg)](https://i.sstatic.net/ZajEj.jpg)
  
  **Tags:** part-identification, colour
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-07-31. Score: 6 | Accepted answer
  
  The color of the 2x4 plate and 1x2 jumpers in the photo appears to be regular Dark Blue:
  
  [![enter image description here](https://i.sstatic.net/wAK4f.jpg)](https://i.sstatic.net/wAK4f.jpg)
  
  The greenish tint you mention is likely discoloration. Here is an example of a discolored regular blue piece (right) next to a fairly new regular blue piece (left) for comparison:
  
  [![enter image description here](https://i.sstatic.net/n6GYf.jpg)](https://i.sstatic.net/n6GYf.jpg)
  
  How uniform or consistent the discoloraton is depends on the cause and/or whether the piece was assembled when it occurred.
  
  > **Comments:**
  > **username_0**: I should have included that for comparison, but unfortunately its not. Its got a slightly greener tint than dark blue. Do you know if they change the color over time? Its like this on the entire brick, so I assume its not faded.  
  > **username_1**: @Zach Turley - Based on my experience, blues brick of all shades can turn a dingy greenish color with age, sunlight or excessive heat. The shade of green, of course, depends on the shade of blue.  I have just recently treated some discolored dark blue bricks (among many others) with hydrogen peroxide, heat and a fluorescent light with very good results.  There are a variety of methods using hydrogen peroxide to restore plastic color. A quick Google search will help you find instructions if you're interested.  
  > **username_2**: Greenish accent on blue bricks appear due to so called "yellowing" process. It happens a lot with older bricks. So they get more of yellow/brown tint over time. I do believe the color you are looking at is Dark Blue [BL]. It is just bricks got yellowed.  
  > **username_0**: @JohnnyB Thank you for the update and great answer.  I didn't realize that heat/age would be another factor instead of just sunlight: the bottoms are identical in color to the top, so I believed discoloration was not the case here.  
  
  ---
  
  