Just wanted to discuss this a little:

red_theme
pink_theme
yellow_theme
orange_theme
brown_theme -> warm_colors

blue_theme
purple_theme
green_theme -> cool_colors

Reason: They're all essentially subsets of the latter tags.

I didn't even know those tags existed

We keep coming up with more inventive ways to search for posts, I suppose.

Hrm, most of those should really be done on a case-by-case basis for accuracy, but using implications do seem to have their benefits, like:

• Ensuring the cool colors & warm colors tags are constantly kept updated, assuming the *_theme tags are tagged as well

• Keeping things more objective, since the implications are automatically applied

• Some other reasons I haven't thought about as yet

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All those sound great! Except for brown;
Since it's usually grouped as a warm colour, but could be closer to a neutral/cool colour, depending on the saturation (post #135321, post #240140, post #206149)

That could be applied to almost all the colour-themes too, since the saturation levels can drastically vary

But, it's something that could make meta-colour tagging much much convenient, provided that everyone agreed on a threshold
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So far, we've got:

red theme -> warm colors
orange theme -> warm_colors
yellow theme -> warm_colors
pink theme -> warm_colors

green theme -> cool_colors
purple theme -> cool_colors
blue theme -> cool colors

for sure, and disputed on:

brown theme
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What about greyscale and black and white? Should they be implicated to anything, like cool_colors?

titaniachkt said:

• Ensuring the cool colors & warm colors tags are constantly kept updated, assuming the *_theme tags are tagged as well

This is the main reason I want the implication. The [temperature]_colors tag was created awhile ago, but it never really caught on. I would've given up on it but I cam across the [color]_theme tags and they seemed like a good way to give the former tags a bit of a bump.

All those sound great! Except for brown;
Since it's usually grouped as a warm colour, but could be closer to a neutral/cool colour, depending on the saturation (post #135321, post #240140, post #206149)

I was iffy on this one. I picked warm because when I looked through the tag most of the images came off as warm-colored.

What about greyscale and black and white? Should they be implicated to anything, like cool_colors?

Black and white aren't colors.

The neutrals of black and brown also carry warm attributes.

But not sure about cool ones, but eh. Not against you, Titaniachkt.

Not an expert on colors, anyways. :E

Ok, so the first thing that needs to be said when talking about colors (and I use color to mean any visual input or lack thereof detectable by the human eye (this includes hueless values like black, grey, and white)) is that the human eye sees color as relative. That means, depending on how it's used with other colors in a scene, any color may function as warm or cool.

That said, when comparing the visible gamut as a whole, certain hues can be said to feel more warm or cool than others in an absolute sense (fun fact: the warm hues correlate with those wavelengths most strongly emitted by our sun and the cool hues with those most weakly emitted). In general,

A color with

• a hue from magenta to red to yellow is perceived as warm.
• a hue from to green to cyan to blue is perceived as cool.
• a hue between yellow and green is less clearly defined but leans toward warm.
• a hue between blue and magenta is less clearly defined but leans toward cool.
• a very low saturation or no hue at all is considered neutral.

So, if we map these primaries and secondaries to the "traditional" colors of our themes,

We have:

• red_theme, orange_theme, yellow_theme +> warm_colors
• green_theme, blue_theme, purple_theme +> cool_colors

Although a pink can sometimes be so desaturated and close to magenta that it appears purple, most pinks are obviously between magenta and red.

Therefore:

• pink_theme +> warm_colors

While a brown can technically be any darkish and somewhat desaturated color, the name is most commonly applied to dark and desaturated colors with a hue from magenta-red to yellow-orange.

Therefore:

• brown_theme +> warm_colors

In addition, people seem to have created the tags white_theme, grey_theme, and dark_theme. If we intend to keep these, I suggest they be standardized by proceeding to

Alias:

• white_theme => light_theme
• gray_theme => grey_theme
• black_theme => dark_theme

Another point I'd like to make is that a black_and_white image is really just a greyscale image with the majority of its values occupying the far ends of its image histogram. Therefore,

I suggest:

• black_and_white +> greyscale

Because an image with a grey_theme can include saturated colors so long as the majority of the image is desaturated, grey_theme should not imply greyscale. Conversely, because a greyscale image could be anything from a solid black square to a solid white one (if indeed such images were ever approved), greyscale should not imply grey_theme.

Finally, as I said before, blacks, greys, and whites are generally considered neutral colors. Therefore,

I suggest:

• light_theme, grey_theme, dark_theme, greyscale +> neutral_colors

... And that's all I have to say about that.