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tilemill-project / tilemill

TileMill is a modern map design studio
https://tilemill-project.github.io/tilemill/
BSD 3-Clause "New" or "Revised" License
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Tilemill's colorpicker & rendering appear different from reported colors #1646

Open jeffreyameyer opened 12 years ago

jeffreyameyer commented 12 years ago

If I use the Hues app to check the color in the color picker, it shows a different Hex value than the color picker does. Hues reports values very close to those shown on Adobe's Kuler site.

In the image below: http://img685.imageshack.us/img685/855/tilemill3.png The color that's supposed to be #d95555 (see: Venezuela) is being rendered as #d75658.

Note that in the color picker, it's being identified as #d95555, so it appears the picker may have an issue. (Or I do!)

springmeyer commented 12 years ago

Interesting observation. I can replicate some interesting shifts as well outside of TileMill. A map rendered with Mapnik using <PolygonSymbolizer fill="#d95555"/> is detected by hues as #D65454 for me. Some rounding errors are expected in Mapnik due to the way that alpha compositing works (we multiply rgb by a before rendering and then demultiply after rendering). But this looks slightly larger that you'd want:

>>> import mapnik
>>> mapnik.Color('#d95555')
Color(R=217,G=85,B=85,A=255)
>>> mapnik.Color('#D65454')
Color(R=214,G=84,B=84,A=255)
springmeyer commented 12 years ago

I'd be interested if @ajashton can replicate this with some other color detection tool on linux.

jeffreyameyer commented 12 years ago

Didn't see the issue on the latest Window build... would've tested on Ubu if I could've remembered my vm pwd... !@#$@!#$

jeffreyameyer commented 12 years ago

Confirmed in TileMill (v0.9.1 (couldn't find a dev build)) on Ubuntu 12.04 LTS - same offset as with Mac - #d95555 is being rendered as #d75658. (at least... inside an Oracle VirtualBox Ubuntu guest vm...)