When Digital Color Meter runs in the foreground, you can pick a color from the screen by moving the mouse cursor to its location and hit the Space key to add it to a list. You can also use the application to create a color list and copy all the included codes. If it says 255,0,0 then you're going to eventually be in a world of hurt, because it's not correctly handling color profiles.Digital Color Meter: A free and open-source color picker that lets you extract RGB or HEX color valuesĭigital Color Meter is an open-source tool that lets you easily pick colors displayed on your screen and copy their HEX or RGB codes to the clipboard. If it says the RGB values are 234,51,35 (or thereabouts) then you're in good shape. Create a new document, set the color profile to sRGB, fill it with 100% red, and see what Digital Color Meter tells you. Here's how to check if your image editor of choice does the right thing when making and saving images. My image editor, Acorn, correctly handles images with embedded profiles as well (because it's awesome). Amusingly, QuickTime Player 7 does not show the right colors at all (it hasn't been updated in 6 years so I guess that's no surprise). Photos almost shows the right colors for P3 images (it seems to have some gamma issues when scaling images). Try it with Preview and you'll see that does the right thing with profiles. You can use this trick with any application you have. This shows that Firefox is doing the wrong thing with color management. If you move your pointer over the red columns, you'll see that Digital Color Meter is showing 255,0,0 for both the sRGB and Display P3 images. Now open up this same page in Firefox (I'm using version 48.0, which it tells me is up to date). If you're looking at these two images on a P3 iMac, you'll be able to see this not just with the red column, but also with the green and blue columns as well. Because sRGB fits inside Display P3, 100% sRGB red is going to be darker. These differing values prove to us that Safari is doing the right thing with color management. (100% red in the sRGB colorspace, as output to a P3 capable display.) If you hover over the red column in the Display P3 image, you'll see 255,0,0. If you open up Digital Color Meter, set the popup to "Display native values", and hover over the red column in the sRGB image, you'll see that the RGB values are set to 234,51,35. Because of this, when viewed in Safari or Google Chrome on a recent iMac, they will show slightly different colors. The only difference between them is the color profile they are tagged with. It's a great tool.īelow are two images, which at the bitmap level are identical. If you're not- then I guess you're about to be. If you do any web design, you're probably already familiar with it. Located in your Utilities folder is an application named Digital Color Meter, which will let you know the color of any pixel on your screen. If you have a different wide gamut display I'm going to assume you have enough knowledge on this topic to know how the values below might be slightly different for your case. For simplicity, this overview assumes that you're using a recent iMac (Retina 5K, 27-inch, Late 2015) with the display's color profile set to "Display P3", or "iMac" (which is close enough).
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