Here's an approximate color timeline of Aerus's L-shaped uprights since '86; except the PowerTeam labels 1400, 1400X, & 1400XP; Sanitaire models SC6600 & SC6600A; Pullman-Holt model UV5, Veridian Prolux OBT rebrands; and Globaltek models.
KEY
* Factory equipped with headlight
** Factory equipped with pigtail port
*** Factory equipped with electric hose & onboard tool holders
+ Made in Canada & Assembled in the USA
^Sold at fairs, in stores, at shows, in catalogs, or on QVC
Color listings: hood/casing or hood & casing/trim
HOUSEHOLD MODELS
Sand/Jade
1986-1987: Models 1500, 1500C, 1572E/Label Discovery II
1986-1987: Model 1572E/Discovery Plus (with onboard tool caddy)
Sand/Taupe
1987-1988: +Model 1572E/Label Discovery III
Sand/Wine
1986-1989: +^Model 1572E/Label Special Edition
Lt. Sand/Steel Blue
1986-1992: +^Model 1572E/Label Regency Series
Lt. Sand/Navy
1988-1989: +Model 1572E/Label Discovery Advantage
1989-1991: +Model 1572F/Label Genesis
1991-1992: *Model 1685/Label Genesis LX
1991-1992: **Model 1717/Label Genesis LXe (10 amps)
Navy/Lt. Sand
1992-1993: ***Model 1717/Label Epic 3000 SR
1993-1995: ***Models 1719, U110A/Label Epic 3500 SR
1993-1995: Models 1770, U112A/Label Epic 2500 SR
Brown/Sand
1993-1994: ^Model 1746/Label Advantage Series (9 amps)
Gray/Coal
1995-1997: ***Model U110B/Label Epic 3500 SR
1995-1997: Model U112B/Label Epic 2500 SR
Oyster/Fog
1997-2000: ***Model U110P/Label Epic 3500 SR
1997-2000: Model U112C/Label Epic 2500 SR
White/Capri
2000-2005: ***Models U110Y, U147A, U155A/Label Lux 3000
2000-2002: ****Model U140A/Label Lux 4000
2002-2005: ****Models U140B, U140C, U156A/Label Lux 6000
2005-2009: ***Model U147E/Label Lux Guardian
2005-2007: ***Models U155B, U155C/Label Lux Legacy
2007-2009: ***Model U155D/Label Lux Classic (9 amps)
White/Lt. Gray
2009-2013: ***Model U147F/Label Lux Guardian
Black/White
2014-present: ***Model U147H/Label Lux Guardian
COMMERCIAL MODELS (no headlight or pigtail port; extra-long cord; reinforced casing; 2-year warranty)
Red/Slate Gray
1987-1994: Models 1572C, 1572G, 1747/Label Prolux Plus (10 amps)
1994-2000: ^Model U111A/Label Prolux (8.5 amps)
1995-1997: Model U120A/Label Commercial
1997-2000: Model U129A/Label Commercial
2000-2002: Model U129C/Label Commercial (10 amps)
??: ^Model U129B/Label Xtreme
??: ^Model U139A/Label Xtreme Plus
2001-2003: Model U129N/Label Lux Commercial
2003-2005: Model U129P/Label Lux Commercial
2005-2009: Model U129Q/Label Lux Commercial
2009-2014: Model U129S/Label Lux Commercial
Lt. Sand/Jade/Orange
2001-2002: ^Model U136B/Label Prolux 2000
Black/Slate Gray
2014-present: Model U129U/Label Lux Commercial
LIGHTWEIGHT MODELS
White/Lt. Gray/Stainless Steel
2002-2007: ^Model U160A/Label Ultralux
White/Lt. Gray/Black
2005-2008: Model U162A/Label Lux Lite (bagless; by TTI)
White/Lt. Gray/Black/Orange
2008-present: Model U162C/Label Fresh Era (by TTI)
Black/Gray
2014-present: Model U162E/Label Fresh Era (by TTI)
Trim/Accessory Upgrades: slider/indicator power switch to rocker switch; bag capacity indicator; optional onboard tool caddy; optional offboard tool caddy; headlight; pigtail port; electric hose; function panel on hood; bag full light; loop handgrip (Electrolux Commercial & Lux Commercial); HEPA filter; carbon filter; synthetic filter bag
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Additions & corrections appreciated