What 35.09 tells you about Cypress Green
The published LRV of Benjamin Moore Cypress Green 509 is 35.09. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Cypress Green's warm olive-gray description gives it a different role from a cooler blue-green sage.
The choice beside oak beams and cream upholstery
Oak beams already add warm color and visual weight; the wall should not be chosen solely because another olive accessory looks appealing.
Compare Cypress Green and Dark Olive at equal size, first considering depth and then hue. A lighter blue, green or pink is still a colored surface. Use the LRV to organize the depth question without assuming that it measures saturation or predicts which hue the room will favor.
What the comparison can—and cannot—settle
Cypress Green has an LRV of 35.09; Benjamin Moore Dark Olive 2140-30 is 13.52. The difference is 21.57 points, with Cypress Green returning more light under the reference measurement. Cypress Green is a warm olive softened with gray. The value measures reflectance, so it cannot by itself identify an undertone, a coating finish or the amount of illumination needed in the room. The daylight and evening-light checks covers that related choice.
Keep the olive only if it separates comfortably from the wood; compare a grayer sage to clarify the choice. Do not read LRV 35.09 as a percentage improvement in perceived room brightness. Make the decision with the board upright at the actual wall or cabinet position, including the least illuminated portion. The north-facing room assessment covers that related choice. Before ordering samples, compare room-planning features in the paint color visualizer roundup.
Sources & notes
Color specifications: Benjamin Moore Cypress Green 509. The recorded LRV is 35.09. Named comparison values come from the respective manufacturers; material schemes are editorial suggestions.
This guide reviews published color information and proposes practical sample checks. It does not claim first-hand paint testing or customer-review scores. Benjamin Moore does not sponsor or endorse this site. Product names and trademarks belong to their respective owners. Confirm the color in a physical sample and select the coating for the actual surface and finish.