Comparison

Deep Mystery vs Royal Treatment

Dunn-Edwards DE5923 and Vista Paint 7189, ΔE 2.61 apart

Dunn-Edwards Deep Mystery DE5923 on a wall, hex #494C59
Deep Mystery Dunn-Edwards DE5923
Vista Paint Royal Treatment 7189 on a wall, hex #51505D
Royal Treatment Vista Paint 7189
Zeytin’s verdict · ΔE 2.61Close cousins. Paint a sample of each before you choose.

Dunn-Edwards Deep Mystery (DE5923) and Vista Paint Royal Treatment (7189) measure a delta-E of 2.61 apart. They sit within 0.3 LRV points of each other, so neither will look brighter than the other on the same wall. Both carry a similar amount of color, at chroma 8.3 and 8.2. The undertones part company: Deep Mystery reads as a blue undertone at hue angle 283.2 degrees, Royal Treatment as a violet undertone at 294.4. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Royal Treatment depth in Dunn-Edwards's line, start from its LRV of 7.0 rather than matching by name.

Is Dunn-Edwards Deep Mystery the same color as Vista Paint Royal Treatment?

Not quite, but close - Dunn-Edwards Deep Mystery and Vista Paint Royal Treatment are delta-E 2.61 apart, close enough that most rooms would not show the difference.

What is the delta-E between Dunn-Edwards Deep Mystery and Vista Paint Royal Treatment?

The measured color distance between Dunn-Edwards Deep Mystery and Vista Paint Royal Treatment is delta-E 2.61.

CLOSEST PAIRΔE 2.61 Deep Mystery and Royal Treatment
LIGHTESTDeep Mystery LRV 7.3
DARKESTRoyal Treatment LRV 7.0
SPREAD0.3LRV points

Side by side

measured values
Deep Mystery Royal Treatment
Brand Dunn-Edwards Vista Paint
Code DE5923 7189
Hex #494C59 #51505D
Light reflectance 7.3 7.0
Undertone blue undertone violet undertone
Chroma 8.3 8.2
Hue angle 283.2° 294.4°
Color family black black

Each on its own

full detail