mattfractionblog: lewisandquark: So it turns out you can train a neural network to generate paint colors if you give it a list of 7,700 Sherwin-Williams paint colors as input. How a neural network basically works is it looks at a set of data – in this case, a long list of Sherwin-Williams paint color names and… Continue reading Paint colors designed by neural network, Part 2
lewisandquark: So if you’ve ever picked out paint, you know that every infinitesimally different shade of blue, beige, and gray has its own descriptive, attractive name. Tuscan sunrise, blushing pear, Tradewind, etc… There are in fact people who invent these names for a living. But given that the human eye can see millions of distinct… Continue reading New paint colors invented by neural network
Fun fact; due to the way your eye detects color, that is, the three types of cone cell: S, M, and L (blue, green, and red, respectively), there are colors that, while technically possible, cannot be seen, due to the fact that the mix of signals required for the eye to send the signals that would cause them cannot be generated by visible light. This is because the wavelengths that activate these cones overlap.
In particular, because your “green cones” are in the middle, in terms of sensitivity to wavelength, any possible light that activates them also activates your “red cones” and/or your “blue cones”. This means that there is a green that you are, theoretically, capable of perceiving, should you induce “green cones” to fire without firing “red” or “blue cones”, but it’s literally impossible for any real object to ever look that green.
So magenta isn’t real, and there’s a real green you can never see.
Eyes are weird.
“The colours red, blue and green are real. The colour yellow is a mystical experience shared by everybody.”
Consider it demolished, Guildenstern.
serious question though: at what point in the purple spectrum does the purple stop being ‘real’? what is the last actual wavelength of purple? 400? anything redder-looking than indigo?
additional question: we cant see ultra-violet so what does it look like on a light display when the wavelength shades off that way, below 400? does it just look ‘stuck’ on whatever the last wavelength of purple it is that we can see? or does it just fade to black and grey as the information we can perceive dwindles?
I think it varies between people from about 380 to 400 nm. If something is reflecting a wavelength that’s not on the visible spectrum I’m pretty sure it’s just going to be black – that is, absent color – since it won’t be reflecting any visible light. From what I understand it’s a pretty abrupt delineation, but I might be wrong about that.
Also, unrelated to Roach’s question, the way magenta is explained is sorta misleading? You get magenta from mixing red light and blue light without hitting the green cones at all, but it’s not any faker than any other color. Your brain doesn’t see color directly, all color is pure invention based on what cones are being activated. Magenta’s just pinging red and blue cones in a way that your brain decides means ‘magenta,’ in the same way that a red/green ping is going to mean ‘yellow’ – only difference is that one wavelength of light is pinging the red and green cones, while two separate wavelengths are combining for magenta. The statement about green is correct: there’s no wavelength of light that will ping a green cone that does not also ping a red or a blue cone.
So you can ping only blue and only red and only red-and-blue, but not only green. If you ping all three kinds of cones equally, your brain reads it as white. Our brain essentially reads color just like a computer does, in RGB hexcodes.
captainharrie: I see this kinda advice passed around all the time here is the thing: shading with black will indeed look bad if you don’t know what you are doing. However, telling people not to do things without explaining why is terrible advice. Shadows are the opposite of light, this includes in colour. This means… Continue reading
i feel this is misleading… magenta is part of a collection of non-spectral colors, which includes grey, white, black, violet/red… so yes, while it doesnt exist in the visible spectrum of light, it very much does exist! as you can see in the spectrum, purple is at the very high frequency end whereas red is at the low frequency end of the visible range. magenta can actually be made by shining violet and red lights of equal intensity at the same point. it’s this discrepancy of frequencies that means that it is not possible for magenta to be a spectral color.
what i think op is trying to say is that when we see light, our brain averages the wavelengths together. this is why when you shine a red and a green light on a spot at equal intensity, you’ll see yellow. technically, the average wavelength of violet and red is green, but the discrepancies in wavelength is interpreted as magenta.
how can a color that “doesn’t exist” be made with paints? how can this color be described as “not existing” when technically, by this logic, neither does white, grey, or black? it’s more accurate to say that magenta is the work of biology rather than optics.
persephonesidekick: damnselfly: tforgery: the-duo-of-anime-love: catsidae: sailorsyo: spaghetti-isnt-scary: actuallyarmin-arlert: amp9ra: sailorsyo: LOOK ME IN THE EYES AND TELL ME THIS ISN’T ORANGE ITS YELLOW (itsorangethough) no that is a slice of cheese do you think this is a fucking joke WAIT YELLOW and YOUR color next to each other. It’s close to yellow, but at the same… Continue reading
Given the sudden interest for the color of dresses and vision, here some of the fascinating findings we did recently.
The color nuances we see depend on the number and distribution of cones (=color receptors) in our eye. You can check this rainbow: how many color nuances do you count?
You see less than 20 color nuances: you are a dichromats, like dogs, which means you have 2 types of cones only. You are likely to wear black, beige, and blue. 25% of the population is dichromat.
You see between 20 and 32 color nuances: you are a trichromat, you have 3 types of cones (in the purple/blue, green and red area). You enjoy
different colors as you can appreciate them. 50% of the population is
trichromat.
You see between 33 and 39 colors: you are a
tetrachromat, like bees, and have 4 types of cones (in the purple/blue,
green, red plus yellow area). You are irritated by yellow, so this color
will be nowhere to be found in your wardrobe. 25% of the population is
tetrachromat.
You see more than 39 color nuances: come on, you are
making up things! there are only 39 different colors in the test and
probably only 35 are properly translated by your computer screen anyway
🙂
It is highly probable that people who have an additional 4th
cone do not get tricked by blue/black or white/gold dresses, no matter
the background light 😉
Monsters' Queen 