What 43 tells you about Stardew
The published LRV of Sherwin-Williams Stardew SW-9138 is 43. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Stardew is deeper than Upward, offering a more substantial slate-blue presence without reaching navy depth.
The choice beside cream linen and oak furniture
Cream linen and oak create a calm setting, while morning and evening use determine which light conditions deserve the most weight.
Compare Stardew and Upward 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
Stardew has an LRV of 43; Sherwin-Williams Upward SW-6239 is 57. The difference is 14 points, with Upward returning more light under the reference measurement. Stardew is a balanced slate blue with a medium reflectance value. 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.
Check the morning wall and evening seating corner separately; the useful blue is the one that works in both. Do not read LRV 43 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: Sherwin-Williams Stardew SW-9138. The recorded LRV is 43. 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. Sherwin-Williams 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.