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LRV Calculator

Home Resource DocumentsLRV Calculator

Light Reflectance Value Contrast

As an industry ‘rule of thumb’, a 70% Light Reflectance Value (LRV) contrast between sign text and background colors is an ideal guideline to follow when evaluating color and finish options. LRV values for all paint finishes in our Standard Ranges and the calculation used to calculate LRV contrast have been provided for you in our Standard Color Documentation. Most major paint manufacturers include LRV values for their colors in their swatch books. These values, along with ours, can be used in the manual calculation below.

Launch LRV Calculator
Light Reflectance Value Formula

Contrast = ( B1 – B2 ) x 100 / B1

B1 = light reflectance value (LRV) of lighter area
B2 = light reflectance value (LRV) of darker area

Our experience has shown that the 70% figure is not a magic number. Contrasts of a few percentage points below the recommended figure, depending on the colors chosen, can often yield legible results.

Light Reflective Value Contrast Calculator

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  • Text Color
  • Background Color

Text Color

White: SC-901

Background Color

Black: SC-905

Contrast

A Contrast between text and background of 70% or above is recommended for greatest legibility

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