North Star and Krypton: the documented difference
North Star has an LRV of 62; Sherwin-Williams Krypton SW-6247 is 52. The difference is 10 points, with North Star returning more light under the reference measurement. Choose by the material relationship as well as the number. North Star is lighter than Krypton and close to Misty in reflectance, making the blue-gray character important beyond the numbers. Krypton is a blue with slate-gray undertones.
| Color | Brand / code | LRV |
|---|---|---|
| North Star | Sherwin-Williams SW-6246 | 62 |
| Krypton | Sherwin-Williams SW-6247 | 52 |
The choice beside white curtains and honey oak
Honey oak can counter a cool-looking wall, but it cannot create daylight in the shaded return that needs assessment.
Set up both candidates with white curtains and honey oak. Use equal-sized boards with the intended finishes and place them in the same orientation. Do not put one directly beside a window and leave the other in shadow. A difference that follows the position rather than the board is a lighting observation, not evidence that the formula changed.
What the comparison can—and cannot—settle
The alternative Misty has an LRV of 64.
Check the darkest return wall with the curtain drawn; choose the blue-gray appearance you will actually live with. Assess North Star and Krypton alone as well as side by side. The unchosen board will not remain in the finished room, and a preference created only by that neighbor may not survive its removal. Before ordering samples, compare room-planning features in the paint color visualizer roundup.
Sources & notes
Color specifications: Sherwin-Williams North Star SW-6246. The recorded LRV is 62. 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.