Viewing profile — mpetroff

> My initial instinct is that finding 12 colors that are visually distinguishable for all users is likely impossible. Without going to lightness extremes, I agree that this likely …

While not completely identical, it looks very similar (I also only have strong protanomaly, not complete protanopia, so I wouldn't expect it to look identical). Color-vision defici…

Please don't use rainbow-type palettes, as they generally have poor accessibility for colorblind individuals. With my red deficiency, the middle two colors in this palette look vir…

I wrote a simple web-based night sky viewer a while ago [1], which renders the 750 brightest stars from coordinates in a data file (along with the moon). It uses D3.js to do fully …

Figure 24 in Paul Tol's Notes is a reasonable thing to try: https://web.archive.org/web/20250201164619/https://personal.... However, to properly screen for color vision deficiencie…

> Always fun to bump into Polies here :) Definitely! I wasn't expecting to see a mention of BICEP while reading HN from Pole, particularly not on something as arcane as its star ca…

With images taken at night, you can run the images through Astrometry.net, which is a blind astrometric solver and will provide you with RA / Dec for most images, as long as you ha…

BICEP3 actually uses a >20 year old CCD camera with analog video output (BICEP Array uses newer cameras, with more modern sensors). Daytime star pointings are possible by using a l…

> the default color palette is colorblind-friendly No, it very much isn't. The second and third colors, the orange and the green, look extremely similar to protanopes (red deficien…

I implemented it as part of a GSoC project a decade ago, which was first included in the 0.91 release in 2015.

You're correct, and the other responses saying otherwise are misinformed. Protanopes do not have long-wavelength cones and thus have reduced sensitivity to that end of the visible …

That's to be expected since the Coblis methods, particularly the v1/ColorMatrix version, are known to be very inaccurate. Unfortunately, it's usually the top search result for "col…

It applied a linear transform to RGB values, like the current method, but the original matrices were the "colorjack.com matrices" [1] that have been floating around the internet fo…

For those interested, I've done some recent research on this topic [1], which tries to find cycles of colors that optimize both accessibility for color vision deficiencies, using s…

The simulation technique [1] currently used by the Firefox / Chrome dev tools is reasonable, so it's definitely much better than not checking for color vision deficiency accessibil…

I'd argue that the 147 named CSS colors are still too many (but definitely better than the ~16.8 million sRGB colors). Regardless, since hex codes are used in practice, they would …

This would be true if the CSS color names were actually reasonable, but many of them are not. One would be better off using the results [1] of Heer & Stone (2012) [2] (or a similar…

The WCAG also define the contrast ratio in terms of sRGB, which is not a perceptually-uniform color space. This makes the WCAG contrast ratios somewhat meaningless in terms of huma…

The issue isn't with referring to colors on a chart by name but with using a color name as the sole identifier. Referring to parts of a chart by color is fine, and provides additio…

> The key would be to spend an absurd amount of time carefully cataloguing good colors – by hand – and training it to extrapolate from that information. It's a bit more nuanced tha…

I linked to the supplementary information [1] in my previous comment, but here's the link for the paper [2]. The method is implemented by the Colorspacious library [3] for Python, …

Adding to this, the Chrome (83+) and Firefox (81+) developer tools both do a reasonable job at the simulation, using the method of Machado et al. (2009) [1]. Unfortunately, the lin…

It's possible, but the markup is very, very messy. I made a proof-of-concept by hand a couple months ago [1], but it would require quite a bit more work to automate it. It's probab…

Bertin's Semiology of Graphics ?