There are three types to look at if you think your bird belongs to a budgie varieties with grey markings. These birds have markings that are either grey, a very pale grey or even reduced to be clear. This means the stripes on the head, down over the neck and the wing markings are some shade of grey or not present.
The budgie varieties with grey markings are the Greywing, Clearwing, Dilute and Faded.
The markings of this variety over the head and wings are grey and the long tail feathers a greyish blue. They have the normal dark eye with white iris ring, and grey feet and legs. The body color has been reduced to about ½ the strength of normal, and the cheek patches are pale violet (or pale blue or grey if the body color is grey). The tail is greyish blue, usually with a grey shaft.
This variety has the color of its markings and its body greatly diluted. The body color has been reduced to a paler shade of the basic color. This means that any blue or grey birds appear to be bluish, or greyish, white whilst birds of green color appear yellowish green. Often they are so pale as to be called suffused white or yellow, meaning they are that shade with only a pale wash of the green or blue body color visible.
The spots and barring of Dilutes is pale grey, the wings are yellowish or whitish with very pale grey markings. The long tail feathers are either yellow or white with a suffusion of grey.The cheek patches are pale blue/violet, and they have normal dark eyes with a white iris ring.
The Clearwing budgie has normal body coloring, with very little if any reduction in its strength. The spots, barring and wing markings should be either a very faint grey or totally absent. This leaves the bird with lovely white or yellow wings. However, often these birds have pale grey markings that can be almost as dark as a greywing, making it difficult to tell which variety they are. The cheek patches on the Clearwing should be normal violet rather than pale violet of a Greywing though.
They have normal dark eyes with a white iris ring, grey legs and feet, normal colored ceres and blue grey long tail feathers that should have clear shafts, but often are grey. These two budgies are both Clearwings with quite a lot of grey in their markings.
Here are two lovely chicks in a nestbox. They are a Cobalt Clearwing and a Violet Clearwing... can you pick the colour difference on the rumps? The Violet has a slightly more intense colour. They both have lovely clear wings with very little markings.
These three varieties can look very similar. For example, how do you tell a Greywing from a Clearwing with darker grey markings than usual?
The Clearwing has normal strength body colour and cheek patch colour will be normal strong violet or grey.
A Greywing will have paler than usual body colour and pale violet or grey cheek patches.
The Dilute has more reduced colour and markings than the Greywing, and the paler cheek patches than usual too and the long tail feathers will be yellowy or whitish grey.
The photo at the top of the page has a Cobalt Clearwing on the left and a Cobalt Greywing on the right. You can see the difference in body colour and cheek patch intensity.
However, just to confuse the issue totally...! There is something called a Full Bodied Greywing. This is a bird with both Greywing and Clearwing genes, for some reason this combination causes another visual type. They have Greywing type markings but have strong body colour and cheek patches. They can be very difficult to tell from heavily marked clearwings unless you know the parentage. So those are the more common budgie varieties with grey markings, however there is also a very rare variety called Faded.
This variety has the color of the body and markings reduced slightly, as though a little faded. The wing markings can be dark grey (darker than a greywing) or nearly black, and the body color is a bit paler than normal.
The chicks have red eyes when born, but they darken over the first few weeks. They have no iris ring for the first year or two of life but may develop one when older. The feet and legs are pink and sometimes the male has a slightly paler than normal colored beak and cere.
As this is a very rare variety it is unlikely you will come across one.
Remember that these can be combined with other varieties, such as Opaline, Spangle or one of the pied varieties, so it pays to check these out if your bird has any different from normal marking patterns as well as colour.