Welcome Dialog

Welcome to the Community!

We have a brand new look! Take a tour with us and explore the latest updates on Adobe Support Community.


why different colors

New Here ,
Sep 02, 2021 Sep 02, 2021

Copy link to clipboard

Copied

Hello everyone, please tell me why here on the rectangles the layer shows different colors.

TOPICS
Windows

Views

42

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines

correct answers 2 Correct answers

Adobe Community Professional , Sep 02, 2021 Sep 02, 2021
because the two fill layers have different colors.

Likes

Translate

Translate
Adobe Community Professional , Sep 02, 2021 Sep 02, 2021
Your two squares are not the same colour. The yellow channel in the right hand square is at 100%. The yellow in the left 99% . The maths for blending each channel in colour dodge is Background/(1-Foreground).  In the case of CMYK the layer values are inverted before the maths and the result inverted after. It all works smoothly until the foreground layer is 0% which inverted is 1 and the background is 100% which inverted inverted is 0.  That results in maths which is 0/(1-1) = 0/0  which gives...

Likes

Translate

Translate
Adobe Community Professional ,
Sep 02, 2021 Sep 02, 2021

Copy link to clipboard

Copied

because the two fill layers have different colors.

Adobe Photoshop 2021ScreenSnapz002.jpg

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Adobe Community Professional ,
Sep 02, 2021 Sep 02, 2021

Copy link to clipboard

Copied

LATEST

Your two squares are not the same colour.

The yellow channel in the right hand square is at 100%. The yellow in the left 99% .

 

The maths for blending each channel in colour dodge is Background/(1-Foreground).  In the case of CMYK the layer values are inverted before the maths and the result inverted after.

It all works smoothly until the foreground layer is 0% which inverted is 1 and the background is 100% which inverted inverted is 0.  That results in maths which is 0/(1-1) = 0/0  which gives an error for which 0 is used and is then inverted to become 100%. i.e. the channel remains at 100%

 

 

Dave

 

 

 

 

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines