I weighed my color sample set, but there is no way to know when they were made, other than the new colors. So it's not scientific, but interesting.
Almond 10.47
Apricot 10.64
Aqua 9.68
Arc Yellow 8.96
Avocado rhc 9.10
Bahama Blue 10.21
Beige 10.93
Black 10.68
Blaze Orange 8.87
Blood Red
Blue Grain 9.50
Blurple 9.88
Bronze 11.22
Butterscotch 9.92
Canary Yellow 10.55
Carnation rhc 8.97
Carrot 9.78
Charcoal 10.53
Cherry 9.92
Chocolate 10.45
Coffee 9.78
Colon Orange 10.00
Daisy 10.40
Dark Blue 10.64
Dark Brown 10.39
Dark Green 10.72
Dark Red 9.24
Day Blue 10.67
Day Green 9.97
Desert Flower 9.50
Dolphin Blue 10.59
Forest Green 9.95
Fuchsia 10.15
Gold 10.79
Grape 10.13
Grey 10.39
Hawaii Flower 10.53
Horizon Blue 8.88
Hot Pink 8.97
Ice Blue 10.34
Indian Blue 10.14
Lavendar 10.24
Lemon Green 9.28
Light Blue 10.46
Light Pink 9.77
Light Violet rhc 9.07
Lilac 10.34
Lime Green 10.45
Maroon 10.00
Mauve 11.33
Melon 10.08
Metallic Gold 11.93
Metallic Silver 10.11
Mexican Rose
Mint Green 10.46
Moss Green 10.68
Munzel Green 10.43
Mustard 10.76
Navy Blue 9.40
Ocean Blue 10.45
Off White 10.65
Orange 10.75
Orchid 9.55
Pale Green 9.17
Pastel Green rhc 9.42
Peach 9.88
Petunia 9.61
Pink 10.66
Plum 10.50
Pumpkin 9.12
Purple 10.60
Radiant Red 9.50
Red 10.36
Rose 9.92
Royal Blue 10.00
Royal Red 10.71
Rubine Red rhc 9.20
Russet 10.62
Salmon 9.44
Sea Green 10.39
Sherbet Green 9.79
Sherbet Orange 10.51
Showboat Grey 10.77
Sky Blue 9.96
Sunrise 10.53
Tan 10.36
Watermelon 10.00
White 10.90
Yellow 10.52