Pika
A colour picker with contrast built in.
About Pika
Pika picks foreground and background colours and checks them against WCAG contrast right away. It's free and open source.
Install Pika
Download it from the links above, or install it from the Terminal:
brew install --cask pika Questions about Pika
Is Pika free?
Yes. Pika is free and open source under the MIT license. The source code is on GitHub at superhighfives/pika.
Where can I download Pika for Mac?
Download Pika from the developer's website (superhighfives.com) and GitHub. MacWorthy links only to official sources.
Can I install Pika from the Terminal?
Yes. With Homebrew, run brew install --cask pika.
What are good alternatives to Pika?
Other design & photo apps for Mac worth a look are Sip (subscription), ImageOptim (open source), ImageFlow (open source) and Equinox (open source).
Other design & photo apps like Pika
Sip
Collect, organize and share colors.
ImageOptim
Smaller images, same pixels.
ImageFlow
Non-destructive image editing with nodes.
Equinox
Make your own dynamic wallpapers.
Pixelmator Pro
A pro image editor, built entirely for the Mac.
Affinity
Pro vector, pixel and layout tools in one app.
Sketch
The native interface design tool.
Acorn
The image editor for humans.