Ombre is a term that many times gets applied to types of yarn, those that may be variegated with all of the colors being of a similar hue and merely differing in shade. But perhaps I'm getting a bit ahead of myself. These are all artistic terms that refer to color so let's start there...
Merriam Webster defines an ombre as such:
having colors or tones that shade into each other - used especially of fabrics in which the color is graduated from light to dark.
Meandering back to the point. Hue essentially is color, the world of science defines it based on light reflected and references that a hue is in lay terms a basic color - like blue, red, green, etc. Light blue, medium blue, and dark blue would all be of the same hue - eg blue. Then there are shades - made with the addition of black and tints - made with the addition of white. But that gets into an artistic defining of hue. For the artistic a hue is still a color, but one that neither involves a shade or tint.
So in considering creating an ombre pattern within a project you would want to stay within the same hue, and use varying shades. I do suppose you could use varying tints as well but the whole effect is by using varying degrees of darkness (or lightness) of the same color. Then all of this had me thinking way back to a painting I did in high school (unfortunately long since destroyed) wherein we did a gridded drawing, painted with acrylics on a large bit of panel canvas in four different styles - true color (to the picture), warm colors, cool colors, and a monochromatic one of any color. I chose blue and while it's been forever since I did it I can still rather clearly see the varying tints and shades of blue. A monochromatic pattern mimics the ombre affect to a point.
They bring us other feelings too, some psychological others less so. For instance a small room painted a dark color only appears smaller than were it painted a lighter color. We have colors we are familiar with around certain holidays which help bring those feelings to mind - the red, green, silver, gold, and white of Christmas reminds us of the snow, bells, tinsel, trees, and bright decorations. Whereas the red, pink, and white of Valentine's Day has us thinking amorous (or anti-amorous) thoughts.
Then there is the tradition within culture, in some such as Chinese, white is associated with death and mourning. In others its associated with purity and innocence. Red-haired people in several cultures were regarded as evil - then again it wasn't genetically the norm to see children with that hair color so they were regarded entirely differently.
In the comments below I'd love to hear about your experience with color! Do you ever notice how it makes you feel? Do you find yourself gravitating towards certain colors and shying away from some others? Have you ever seen something you loved but didn't buy because you hated the color? If you're new to my blog make sure you join the newsletter and check me out on social media so we can connect!