Observatory vs Proper Blue

Observatory (No.No.34) and Proper Blue (No.No.67) are both Mylands blues. The gap between them is ΔE 9.6 — “similar”. Observatory is the lighter of the two, and Proper Blue the warmer. Both cost about £27.20 per litre.

Observatory #4E5E7D £27.20/L

Proper Blue #2C516A £27.20/L

	Observatory	Proper Blue
Hex	`#4E5E7D`	`#2C516A`
Lightness (L*)	40	33
Code	No.34	No.67
Price / litre	£27.20	£27.20

More Mylands comparisons

Observatory vs Mayfair Dark
Observatory vs Blueprint
Observatory vs Murmuration
Observatory vs Ultra Violet
Observatory vs Maritime

Looking across brands instead? See Observatory’s cross-brand matches and cheaper alternatives, or Proper Blue’s.