{"slug": "sim-daltonism", "name": "Sim Daltonism", "category": "dev-libs", "category_name": "Libraries and frameworks", "description": "", "recommenders": 4, "commenters": 5, "warners": 0, "score": 3.78, "rising": -1.31, "first": "2025-11-13", "latest": "2026-07-27", "why": "", "why_is_quote": false, "has_verdict": false, "sentiment": {"recommend": 4, "neutral": 1, "compare": 0, "warn": 0}, "spark": [1, 0, 0, 0, 0, 2, 0, 0, 1, 0, 0, 0], "listed": true, "loved": [], "caveat": "", "short_quote": "", "kind": "", "icon": true, "domain": "michelf.ca", "github_repo": null, "official_url": "https://michelf.ca/projects/sim-daltonism/", "pricing": "", "aliases": ["Sim Daltonism"], "verdict": null, "praise": [{"label": "", "summary": "", "quotes": [{"id": 785242416, "item_id": 49077651, "url": "https://news.ycombinator.com/item?id=49077651", "by": "gcanyon", "date": "2026-07-27", "version": null, "stance": "recommend", "quote": "I highly recommend Sim Daltonism.", "excerpt": "For anyone working on a Mac, I highly recommend Sim Daltonism. It gives you an interactive display on your Mac that you can place over any section of your screen to simulate what it looks like to a colorblind person. It simulates several different types of colorblindness. I have a friend who is colorblind, and to the best of our mutual understanding, it is accurate. https://apps.apple.com/us/app/sim-daltonism/id69311", "context": "Mac user", "use_case": "simulating colorblindness on Mac", "switched_from": "", "story": "Colorblind: Checking figure accessibility for colour blind people"}, {"id": 766175888, "item_id": 47885993, "url": "https://news.ycombinator.com/item?id=47885993", "by": "wsc981", "date": "2026-04-23", "version": null, "stance": "recommend", "quote": "This is such an app for iOS / macOS", "excerpt": "There's apps that can simulate color blindness, which can be used for testing purposes. This is such an app for iOS / macOS: https://michelf.ca/projects/sim-daltonism/", "context": "", "use_case": "color blindness simulation", "switched_from": "", "story": "Your hex editor should color-code bytes"}, {"id": 766159424, "item_id": 47884964, "url": "https://news.ycombinator.com/item?id=47884964", "by": "dunham", "date": "2026-04-23", "version": null, "stance": "recommend", "quote": "There is an app for that, too", "excerpt": "There is an app for that, too: https://michelf.ca/projects/sim-daltonism/ It has a little window you can move over the screen to simulate a few varieties of color blindness.", "context": "", "use_case": "Simulating color blindness", "switched_from": "", "story": "Your hex editor should color-code bytes"}, {"id": 734650160, "item_id": 45915635, "url": "https://news.ycombinator.com/item?id=45915635", "by": "Y-bar", "date": "2025-11-13", "version": null, "stance": "recommend", "quote": "I like to use Sim Daltonism", "excerpt": "I like to use Sim Daltonism (https://github.com/michelf/sim-daltonism/) for accessibility testing.", "context": "", "use_case": "Color blindness simulation", "switched_from": "", "story": "Shader Glass"}]}], "caveats": [], "who": [{"by": "gcanyon", "context": "Mac user", "url": "https://news.ycombinator.com/item?id=49077651", "date": "2026-07-27"}], "tags": [], "use_cases": ["color blindness simulation", "simulating colorblindness on mac", "colorblindness simulation", "simulating color blindness"], "compared": [], "makers": [], "threads": [{"url": "https://news.ycombinator.com/item?id=47846688", "title": "Your hex editor should color-code bytes", "mentions": 2}, {"url": "https://news.ycombinator.com/item?id=49027989", "title": "Colorblind: Checking figure accessibility for colour blind people", "mentions": 1}, {"url": "https://news.ycombinator.com/item?id=47926861", "title": "Is my blue your blue?", "mentions": 1}, {"url": "https://news.ycombinator.com/item?id=45857657", "title": "Shader Glass", "mentions": 1}], "sentiment_by_month": {"2025-11": {"recommend": 1}, "2025-12": {}, "2026-01": {}, "2026-02": {}, "2026-03": {}, "2026-04": {"recommend": 2, "neutral": 1}, "2026-05": {}, "2026-06": {}, "2026-07": {"recommend": 1}, "2026-08": {}, "2026-09": {}, "2026-10": {}}, "versions": [], "version_unnamed": 0, "family_ref": null, "runs_on": null, "lines": [], "quotes": [{"id": 785242416, "item_id": 49077651, "url": "https://news.ycombinator.com/item?id=49077651", "by": "gcanyon", "date": "2026-07-27", "version": null, "stance": "recommend", "quote": "I highly recommend Sim Daltonism.", "excerpt": "For anyone working on a Mac, I highly recommend Sim Daltonism. It gives you an interactive display on your Mac that you can place over any section of your screen to simulate what it looks like to a colorblind person. It simulates several different types of colorblindness. I have a friend who is colorblind, and to the best of our mutual understanding, it is accurate. https://apps.apple.com/us/app/sim-daltonism/id69311", "context": "Mac user", "use_case": "simulating colorblindness on Mac", "switched_from": "", "story": "Colorblind: Checking figure accessibility for colour blind people"}, {"id": 766861920, "item_id": 47928870, "url": "https://news.ycombinator.com/item?id=47928870", "by": "ramonaisonline", "date": "2026-04-27", "version": null, "stance": "neutral", "quote": "I have a colorblindness simulator on my computer called Sim Daltonism", "excerpt": "The boundary regions at 3:00, 7:00, and 11:00 are composite colors that have ~2x the brightness compared to the primary colors of red, green, and blue. For someone without a color vision deficiency, they appear brighter than surrounding colors, but the saturation really only varies with distance from the center. For example, to me, the point at 3:00 on the edge of the circle is the peak of a \"ridge\" in brightness, bu", "context": "", "use_case": "Colorblindness simulation", "switched_from": "", "story": "Is my blue your blue?"}, {"id": 766175888, "item_id": 47885993, "url": "https://news.ycombinator.com/item?id=47885993", "by": "wsc981", "date": "2026-04-23", "version": null, "stance": "recommend", "quote": "This is such an app for iOS / macOS", "excerpt": "There's apps that can simulate color blindness, which can be used for testing purposes. This is such an app for iOS / macOS: https://michelf.ca/projects/sim-daltonism/", "context": "", "use_case": "color blindness simulation", "switched_from": "", "story": "Your hex editor should color-code bytes"}, {"id": 766159424, "item_id": 47884964, "url": "https://news.ycombinator.com/item?id=47884964", "by": "dunham", "date": "2026-04-23", "version": null, "stance": "recommend", "quote": "There is an app for that, too", "excerpt": "There is an app for that, too: https://michelf.ca/projects/sim-daltonism/ It has a little window you can move over the screen to simulate a few varieties of color blindness.", "context": "", "use_case": "Simulating color blindness", "switched_from": "", "story": "Your hex editor should color-code bytes"}, {"id": 734650160, "item_id": 45915635, "url": "https://news.ycombinator.com/item?id=45915635", "by": "Y-bar", "date": "2025-11-13", "version": null, "stance": "recommend", "quote": "I like to use Sim Daltonism", "excerpt": "I like to use Sim Daltonism (https://github.com/michelf/sim-daltonism/) for accessibility testing.", "context": "", "use_case": "Color blindness simulation", "switched_from": "", "story": "Shader Glass"}]}