Convert RGB to Hex

RGB to Hexadecimal Conversion

1. Normalize RGB values: Each of the RGB components ((r), (g), and (b)) can range from 0 to 255.

2. Convert to Hexadecimal: Each RGB component needs to be converted to a two-digit hexadecimal value:

$$\text{hex}(r)=\text{int to hex}(r)$$ $$\text{hex}(g)=\text{int to hex}(g)$$ $$\text{hex}(b)=\text{int to hex}(b)$$

3. Combine Hex Values: Combine the hexadecimal values into a single hex string:

$$\text{hex color}="\#\{\text{hex}(r)\}\{\text{hex}(g)\}\{\text{hex}(b)\}"$$

Pseudocode:

Below is pseudocode to convert RGB to a hexadecimal color string.

\begin{algorithm}
\caption{RGBtoHex}
\begin{algorithmic}
  \Procedure{RGBtoHex}{$r, g, b$}
    \Function{intToHex}{$num$}
      \State Convert $num$ to a hexadecimal string
      \State \Return the two-digit hexadecimal string, with leading zeros if needed
    \EndFunction
    \State $hexR \gets \text{intToHex}(r)$
    \State $hexG \gets \text{intToHex}(g)$
    \State $hexB \gets \text{intToHex}(b)$
    \State $hexColor \gets \text{\#} + $hexR + $hexG + $hexB
    \State \Return $hexColor$
   
  \EndProcedure
\end{algorithmic}
\end{algorithm}

Explanation:

• The intToHex function converts an integer ( num ) to a two-digit hexadecimal string with leading zeros.
• The main procedure, RGBtoHex, uses this function to convert each of the RGB components to hexadecimal.
• The final hex color string is assembled and returned.