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29

Human perception isn't the same for all colors. Our eyes have different color pigments which absorb different frequencies of light. There's a bit about this over in Physics.SE: Why do green lasers appear brighter and stronger than red and blue lasers? From this question a chart is presented that shows the absorption of different frequencies of light. The ...


11

"Greyscale" is a print specification basically. Yes it removes color, but the "Greyscale" mode is only really needed for printing. Everything on screen is RGB even if it looks grey. In this respect, when you use the Mode > Greyscale command, Photoshop ignores the RGB data and relies on CMYK color data and your color profile settings to convert. If you ...


8

Do not use a rainbow of colors to indicate different intensities of values. To quote Edward Tufte: Despite our experiences with the spectrum in science textbooks and rainbows, the mind's eye does not readily give an order to ROYGBIV. (From Tufte's Envisioning Information) Remember that, despite the rainbow, most people are used to envisioning the ...


3

Where I live in Australia the Met office (weather) recorded the highest temperature as over about 50 degrees and because Red was the highest representation for the temperature band - they added purple to mark this higher temp on the radar. A key or legend scale might be useful in this situation


3

It is not about wavelength. It's about human emotional connection to the colors. The high indicator is generally red/orange because human nature is to perceive it as vibrant, motion-filled, and dangerous as is fire departments and ambulances. Blues and purples are perceived as calm and safe. This is why you see hospitals, insurance companies, and ...


3

There's no way to predict what CMYK colors will look like on paper from your monitor. Even a calibrated monitor can't match all CMYK colors properly. The options: Invest in a Pantone Process Color Swatch Book. This is a swatch book of actual printed CMYK colors. Find what you are looking for and then use that color in your file. Ask the printer for a ...


3

I find that's it's easier to evaluate RGB colors in the HSB model (Hue, Saturation, Brightness). In this case, it helps you in two ways. 1. It helps me remember that some colors have greater inherent luminance/brightness than others. Just take a look at the green and blue points on the Hue scale. Green is clearly brighter. 2. If you're looking to ...


3

I'm going out on a limb and suppose you've created the wireframe using the Effect > 3D > Extrude & Bevel effect. In that case: Unfortunately, there is no way of doing this and keep the 3D effect editable. You can Object > Expand Appearance the wireframe object, and then change the stroke colour on the resulting group of lines.


2

Any variation in brightness/saturation of colors will be distinguishable in greyscale. I.E. a bright red and a darker green. Or a dark red/burgundy and a bright green. But really the best red green in greyscale is this one....


2

HSV is a color editing tool, it's not a color model. You can edit a CMYK or RGB color with the HSV option. It doesn't change whether it's an RGB or CMYK color. You need RGB for anything on-screen. You need CMYK (or spot) for anything to be printed. If you want consistent color, specifying a spot color would be your best option. Then translating that spot ...


2

There is no fix for this as far as I know. Illustrator doesn't treat white as a color, but as a lack of color. So changing the documents background color changes how white, or rather the absence of color, is displayed. The background color will also alter any colors you place on it. This makes sense if you imagine how things print in the real world – you ...


2

There are two issues here. 1) You should calibrate your monitor if you haven't done that already. You don't necessarily need a top-of-the-line monitor from Dell or Eizo with the truest possible colors, but you should at least be able to 'trust' your own monitor. Often photography stores let you rent the required hardware to calibrate your monitor for a few ...


2

--- GREEN --- That color if you use the eye dropper in Photoshop is 165 red, 250 green, and 46 blue. The only colors you can say for sure aren't green are the ones where the green value is zero. Everything else is at least a little green. Technically. Then anything that doesn't have zero red is at least a little red. And if it doesn't have zero blue, ...


1

You simply need to experiment with modes and opacity to get where you want to go... I, personally, would probably opt for the Color blending mode above Hue. Then simply adjust the opacity of the layer until you're happy.


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Select the object you want to transfer the color to, then click the i key on your keyboard to access the eyedropper tool. Now click with the eyedropper tool on the object you want to copy the color from.


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There are 16,777,216 (256^3) possible RGB color combinations, so a square image in which each color is assigned a single pixel would have dimensions of 4096 px by 4096 px. The following Processing code will generate such an image: int numLevels = 256; // Number of levels per color channel int numChannels = 3; int dim = (int)sqrt(pow(numLevels, ...


1

This is quite interesting, as I found a scientific tectonic map that seems to use purple as a "higher" value (in this case depth of volcanic activity.). To me that does not make sense whatsoever, and it seems in general the scientific solutions is, as is pointed out, purple is a "lowest" value. I have read a lot of heat maps, and this is way out. As for ...


1

You can use the Pixelize feature, Filters > Blur > Pixelize It works better on an photograph because it has more colors to pull from but you can repeat this effect to your liking to create more colors from its previously created or 'pixelized' colors.


1

If you've merely created outlines of the type to generate your 'Wireframe" then simply change the stroke color. If you have indeed used the 3D Effect and set it to "wireframe", then do the following: Group the type Add a new stroke via Appearance panel above the [content] item in the panel Change the color of this new stroke With these steps the 3D ...


1

Insure that your shape layer is selected in the layers panel Choose the Direct Selection tool from the tool bar () or press A Now you'll be able to access all of the properties for your shape in the command bar at the top of the screen—including the shape's fill color.


1

Much like the others have stated, the default color mode for AI is CMYK. Unless you tell it otherwise, your image will be exported in CMYK (not sure why you wouldn't want to color manage it), so you need to change your color mode to RGB via the File menu (as pictured below) then color your artwork accordingly.



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