Thermal (S440-7) is a deep blue from Behr with a moderate blue-green undertone. Its LRV is about 7.4 (very dark): it absorbs almost all light for a dramatic, enveloping look. plan for good artificial lighting. The closest match in another brand is Dunn-Edwards Lunar Eclipse (98% match).

Compare Thermal with other brands

Three catalogs stay in the list — tap another card to swap the last column. Matches are estimates from digital values, not official conversions. Always check a real sample.

LRV

7.4 · Very dark

Undertone

Blue-green · moderate

Temperature

Cool

Code

S440-7

HEX

#3F5052

RGB

63, 80, 82

HSL

186°, 13%, 28%

Family

Blues

Colors similar to Thermal in Behr

Neighboring tones from the same fan deck, if you want a shade lighter, darker, warmer, or cooler.

Thermal FAQ

What undertone does Thermal have?

Thermal is a deep blue with a moderate blue-green undertone. Its color temperature is cool. This is estimated from the digital color values; north-facing light pulls undertones cooler and warm bulbs pull them warmer, so check a real sample on your wall.

What is the LRV of Thermal?

Thermal has an LRV (Light Reflectance Value) of about 7.4 on a 0–100 scale, which is very dark. It absorbs almost all light for a dramatic, enveloping look. Plan for good artificial lighting.

What is the closest match to Thermal in other brands?

Dunn-Edwards: Lunar Eclipse (DE5776), 98%; PPG: Night Watch (PPG1145-7), 96%; Benjamin Moore: Navy Masterpiece (1652), 96%; Valspar: Slate Court (5001-4C), 96%; Glidden: Night Watch (PPG1145-7), 95%; Sherwin-Williams: Tarragon (SW 9660), 94%; Farrow & Ball: Hague Blue (No. 30), 90%; HGTV Home by Sherwin-Williams: Still Water (HGSW6223), 89%. Matches are estimated from digital color values and are not official conversions; always compare a real sample of both.

What is the HEX code of Thermal?

The HEX code of Thermal (S440-7) is #3F5052, RGB 63, 80, 82. Use it for digital mockups; painted color will vary with light and sheen.