Timeline for RGB to hex and hex to RGB
Current License: CC BY-SA 4.0
9 events
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| Mar 8 at 16:59 | history | edited | Kamil Kiełczewski | CC BY-SA 4.0 |
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| Mar 8 at 11:28 | comment | added | abe1432181 | See stackoverflow.com/a/49974627/1432181 for rgba. See jsfiddle.net/Abeeee/ud1as8o3/1 for a running demo. | |
| Oct 29, 2021 at 13:16 | comment | added | Aryo | Yes, the formula is not the actual formula for luminance. Using the actual luminance formula. Blue is somehow perceived darker than green/yellow at the same luminance level. So, there must be something to be changed from each color component. I got the code from here: stackoverflow.com/a/1754281/764788 which measure the brightness level according to a human perceived brightness level of each R, G, and B color and weight each of them respectively. | |
| Oct 29, 2021 at 10:46 | comment | added | Kamil Kiełczewski | @Aryo according to wiki luminance (from hsl) is L = (max(R,G,B) + min(R,G,B))/2 - but I not test it. May be your formula is more based on eye physical properties... | |
| Oct 29, 2021 at 10:35 | comment | added | Aryo |
Nice! I use the following code to calculate the berightness level of the color (e.g. whether the color is dark or light to identify the text color for use with it.) Here's the code in Javascript to get the luminance: let rgb = color.match(/\w\w/g).map(x=>+`0x${x}`); let lum = (rgb[0]*0.299 + rgb[1]*0.587 + rgb[2]*0.114) / 256; lum > 0.5 is light/bright color
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| Jul 12, 2021 at 19:22 | history | edited | Kamil Kiełczewski | CC BY-SA 4.0 |
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| Jul 15, 2020 at 22:08 | history | edited | Kamil Kiełczewski | CC BY-SA 4.0 |
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| Mar 26, 2020 at 10:59 | history | edited | Kamil Kiełczewski | CC BY-SA 4.0 |
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| Feb 21, 2020 at 22:39 | history | answered | Kamil Kiełczewski | CC BY-SA 4.0 |