: How to Identify/Change Blue-Bluish Colors in this Map in Photoshop I want to extract/mark/show all blue colors of the image because there are color blinds who see them as black/wrongly. I need

@Caterina889

I have a solution you should try ..

1 - make a layer mask over your photo

2 - double click on the mask

3 - choose color range

4 - pick the first eye dropper ( you also should choose the " image " checkbox )

5 - start to click on the blue spaces which you want to hide or change

6 - you also can choose the second eyedropper ( with + sign ) to add a new color category to the selection

7 - if you accidentally choose a wrong color remove it with the third eyedropper

8 - once you selected all the parts you need just finish the mask and all this parts will be masked

9 - to change the color of this parts you may make a trick to make a new layer below this layer and fill color it whit any color you want ..

i tested it but the image is so blurry :D

i changed the blue parts with white

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