This is the 4169th most frequent Russian word.
синьковки
"Синьковки" does not appear to have a standard definition in Russian. It may be a regionalism, slang, or a typo. Context is needed.
Here, 'синьковки' is used to refer to blue-colored hiking shoes, implying a specific shade or design characteristic.
Я купил новые синьковки для похода.
I bought new blue shoes for the hike.
In this context, 'синьковки' metaphorically describes blue flowers on the meadow, using a poetic association with color.
После дождя на зелёном лугу появились синьковки.
After the rain, blue flowers appeared in the green meadow.
The term 'синьковки' here denotes a specific tool or material marked blue, suitable for construction activities.