rainbow
Rainbow — Accessibility Contrast Tool for Text on Images (by rodneylab)
leonardo
Generate colors based on a desired contrast ratio (by adobe)
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| rainbow | leonardo | |
|---|---|---|
| 1 | 1 | |
| 1 | 1,855 | |
| - | 1.0% | |
| 3.2 | 5.8 | |
| almost 3 years ago | 10 days ago | |
| JavaScript | JavaScript | |
| BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
rainbow
Posts with mentions or reviews of rainbow.
We have used some of these posts to build our list of alternatives
and similar projects.
-
Accessible Text on Images: Nail the Contrast Ratio
The Rainbow tool was built using a static site generator. It's power lies in a Rust serverless function which does the maths. It works by finding the pixel (in the image) with the lowest contrast to the text colour. Then it uses a bit of High School Maths (the Newton-Raphson numerical technique) to work out the overlay transparency which satisfies the contrast ratio supplied (4.5 by default). There are a few optimisations built in such as resizing the image before getting going to speed up the later calculations. The code is open source and you can view the Rainbow Site code on the Rodney Lab Git Hub page. Now you know what the Rainbow tool is shall we look at how to use it?
leonardo
Posts with mentions or reviews of leonardo.
We have used some of these posts to build our list of alternatives
and similar projects.
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Random color palette generator API?
idk but https://github.com/adobe/leonardo seems promising
What are some alternatives?
When comparing rainbow and leonardo you can also consider the following projects:
a11y-contrast - A CLI utility to calculate/verify accessible magic numbers for a color palette.
mdl-color-palette - Generate Random Color From Material Color Palette