Pattern Profile:
Citrus, Almond, Cinnamon (1979); Slate (1981); Heather (1983); Cobalt, Onyx (1984) 

The Dimension IV product line was introduced late 1979 with Citrus, Almond and Cinnamon.  These smartly banded patterns were the first to appear with the new rimmed shape in dinner plates, luncheon plates, bread & butter plates and soup plates.  Also in the sets were Pyrex mugs in a new flared style, and these were decorated in solid colours.  Optional items available for separate purchase include dessert bowls, soup/cereal bowls, serving bowls and platters, but these were in the usual coupe shape. 

Slate was added to the product line between 1980 and 1982, and Heather was introduced in 1983.  Cobalt and Onyx appear to be new in 1984.  Cobalt is quite different than the others in this line; it has three very thin equally-spaced blue bands on the rim.  But some pieces in Cobalt, such as bowls, may have just two bands.

(l-r):  Luncheon Plates: Cinnamon, Heather;  Platter: Onyx; 
Dinner Plates: Slate, Citrus, Almond.

Citrus was discontinued in 1983, Almond in 1984.  1985 was the final year of production for the following patterns:  Cinnamon, Slate, Heather, Cobalt and Onyx.  In 1985 a new wider rimmed plate style was implemented for many new patterns and the narrow rimmed style of Dimension IV would soon be abandoned, along with the flared Pyrex mugs.

For three of these patterns, the same coloured bands took on a new life in 1986 within the Livingware line.  The plates now had a coupe shape, and Suprema mugs with coloured bands were included in the sets.  Another distinction of the new version was that the 10 oz and 18 oz bowls were decorated with a single coloured band.  There is just one commonality between the old and new patterns; the platters and serving bowls appear to be the same, with both coloured bands.  Chestnut is the coupe version of Cinnamon, Indigo is the coupe version of Slate, and Dusk is the coupe version of Onyx. 

Soup Plates: Cinnamon, Citrus.  Dimension IV was the first product line to include 8½ inch flat-rimmed soup plates.

Colour Schemes: 

Except where noted, these patterns have a white background and the decoration consists of one wide band and one narrow band on the rim.  The dominant colour on the wide outer band is listed first. 

Citrus - orange & bright yellow
Almond - tan & light yellow
Cinnamon (& Chestnut) - rust & tan
Slate (& Indigo) - slate blue & grey
Heather - green & pink
Cobalt – 3 thin equidistant cobalt blue bands
Onyx (& Dusk) - black & grey (with thinner bands)
                 
(Photo: 10 oz dessert bowl, Cinnamon; 18 oz soup/cereal bowl, Slate.)

Corelle Dinnerware:

Rimmed Plates (narrow):
Dinner Plate (10¼”)
Luncheon Plate (8½”)
Bread & Butter Plate (6¾”)
Flat Rim Soup Plate (8½”)

Dessert Bowl (10 oz 5 3/8”)
Soup/Cereal Bowl (18 oz 6¼”) *

1 Qt Serving Bowl (8½”)
2 Qt Serving Bowl (10¼”)
Oval Platter (12½”)

Pyrex Mug (flared, solid colour, 9 oz):
Citrus (orange)
Almond (tan)
Cinnamon (rust)
Slate (medium slate blue)
Heather (green)
Cobalt (dark cobalt blue)
Onyx (black)

* - It is questionable whether 18 oz bowls were ever made for Heather or Cobalt, but 10 oz bowls exist.  These bowls do show the full pattern.

Top row:  Citrus, Almond, Cobalt.  Bottom row:  Cinnamon, Slate, Onyx.

Cobalt is depicted here in a 1985 catalogue image.  The photo implies that all sizes of coupe bowls have 2 bands, while platters have 3 bands.  Dinner and luncheon plates are known to have 3 bands.  At top right are bread & butter plates with 2 bands, and this size of plate also has been seen with 3 bands.  The reason for this anomaly is not clear.

Co-ordinating Pyrex Ware:

Although no ovenware or nesting bowls in opal Pyrex were made for the Dimension IV patterns, there are a few Pyrex items which share the same colour schemes and pattern names. 

The 'Baker In A Hammock' was an innovative promotional item offered in 1981.  The set was comprised of a 3 Qt clear Pyrex #233 pan (9x13) and a hardwood frame supporting a canvas hammock.  For serving, the Pyrex pan was suspended in the hammock, protecting the tabletop from the hot surface.  The detachable canvas was available in solid Cinnamon and striped Almond and Citrus. 

Almond, Citrus and Cinnamon Bakers in Hammocks pictured with Corelle.

Pyrex canisters in the Store 'N' See product line were made with solid coloured tops in Cinnamon, Slate and Almond Mocha (a darker shade of the tan colour found on Almond).  These colour choices were introduced between 1982 and 1985 and the sizes available were 1 Qt and 2.5 Qt.  They were discontinued in 1986.

Related Articles:

Pyrex Flared Mug (1979)
Pattern List: Soup Plates
Plate Styles: Narrow Rimmed
Pyrex Store 'N' See Canisters