There is only a genetic colour difference. Some are lighter or darker than others.
color
The Gravid female will have the dark "gravid spot" in front of her vent. I can however assure you that if there has been a male in the same tank with a female guppy for any reasonable length of time she will be gravid.
i thinks its an 'aidan bean '
the difference is stechn is when its light drawn is when its dark!!
the colour is different! one is light and the other is dark!
a contrast between light and dark.
Light refers to the presence of illumination or brightness, while dark refers to the absence of light or brightness. Light is visible, allows us to see things clearly, and can represent positivity and clarity, whereas dark is often associated with shadows, obscurity, and negativity.
one is light gray one is dark gray
hue
Flat print lacks contrast, it has no dark blacks or clear whites.Contrasty print has exaggerated differences between the light and dark tones
Dark is an adjective used to describe the absence of light, while darkness is a noun that refers to the state or quality of being without light. So, dark is the characteristic of an object or place, while darkness is the concept of absence of light.
The contrast between light and dark- APEX