Calculate the Light Reflection Value of paint colors.
Enter an RGB or HEX color value to determine its Light Reflection Value (LRV). LRV indicates how much light a color reflects.
Light Reflection Value (LRV) is a measure of how much visible and usable light is reflected from a surface when illuminated by a light source. It is expressed as a percentage from 0% (absolute black, absorbing all light) to 100% (absolute white, reflecting all light).
LRV is often used in architecture and interior design to predict how much light a color will reflect, influencing the perceived brightness of a space, energy efficiency (lighting needs), and compliance with accessibility standards (e.g., contrast for visually impaired individuals).
The LRV is derived from the luminance (Y) of the color, which is calculated from its linearized RGB components.
First, convert sRGB values (0-255) to a linear scale (0-1):
For each color component (C, which is
R, G, or B):
If C_sRGB <= 0.03928, then
C_linear = C_sRGB / 12.92
Else,
C_linear = ((C_sRGB + 0.055) / 1.055)2.4
Then, calculate Luminance (Y) using the
linear RGB values:
Y = (R_linear * 0.2126) + (G_linear * 0.7152) +
(B_linear * 0.0722)
Finally, LRV is calculated as:
LRV = Y * 100