To convert from decimal to hex do… string hexValue = decValue.ToString(“X”); To convert from hex to decimal do either… int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber); or int decValue = Convert.ToInt32(hexValue, 16);
I’m assuming that’s an ARGB code… Are you referring to System.Drawing.Color or System.Windows.Media.Color? The latter is used in WPF for example. I haven’t seen anyone mention it yet, so just in case you were looking for it: using System.Windows.Media; Color color = (Color)ColorConverter.ConvertFromString(“#FFDFD991”);
Here’s a correct table of percentages to hex values for opacity. E.g. for 50% white you’d use #80FFFFFF. To think in terms of transparency instead, flip the order of the percentages (more opaque = less transparent). % Hex 100% FF 95% F2 90% E6 85% D9 80% CC 75% BF 70% B3 65% A6 60% … Read more
// Store integer 182 int intValue = 182; // Convert integer 182 as a hex in a string variable string hexValue = intValue.ToString(“X”); // Convert the hex string back to the number int intAgain = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber); from http://www.geekpedia.com/KB8_How-do-I-convert-from-decimal-to-hex-and-hex-to-decimal.html HINT (from the comments): Use .ToString(“X4”) to get exactly 4 digits with leading 0, or .ToString(“x4”) … Read more
use std::stringstream unsigned int x; std::stringstream ss; ss << std::hex << “fffefffe”; ss >> x; the following example produces -65538 as its result: #include <sstream> #include <iostream> int main() { unsigned int x; std::stringstream ss; ss << std::hex << “fffefffe”; ss >> x; // output it as a signed type std::cout << static_cast<int>(x) << std::endl; … Read more
Convert a number to a hexadecimal string with: hexString = yourNumber.toString(16); And reverse the process with: yourNumber = parseInt(hexString, 16);
TLDR Use this clean one-line function with both rgb and rgba support: const rgba2hex = (rgba) => `#${rgba.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+\.{0,1}\d*))?\)$/).slice(1).map((n, i) => (i === 3 ? Math.round(parseFloat(n) * 255) : parseFloat(n)).toString(16).padStart(2, ‘0’).replace(‘NaN’, ”)).join(”)}` 2021 updated answer Much time has passed since I originally answered this question. Then cool ECMAScript 5 and 2015+ features become largely available on … Read more
Without the 0x prefix, you need to specify the base explicitly, otherwise there’s no way to tell: x = int(“deadbeef”, 16) With the 0x prefix, Python can distinguish hex and decimal automatically. >>> print(int(“0xdeadbeef”, 0)) 3735928559 >>> print(int(“10”, 0)) 10 (You must specify 0 as the base in order to invoke this prefix-guessing behavior; if … Read more
RGB to hex and hex to RGB