Such a bright and beautiful color, so cheerful, so uplifting, and a little really does go a long way. My mother had diabetic retinopathy so that many of the cones in her eyes were damaged. The one color she could see clearly was yellow, so she always wanted yellow around her. Gads, it was too much, but for Mama, well, you know how that is.
The color yellow is associated with knowledge, sunshine (of course), and the flourishing of all living things, because of fall color changes in the leaves it is also associated with maturity and fall itself. It is a warm color, so is associated often with joy and cheerfulness. It is also often used for baby shower gifts, as it is light and cheerful, and unisex, unlike pink or blue. Because it is a bright, eye catching color it is often used on warning signs to keep people safe. In the old color understanding it was considered a primary color, though I see some of the newer information puts it as a secondary.
On it’s negative side it is often thought to indicate deceit and cowardice, and it is also considered an unstable and spontaneous color, which are good or bad depending on the context.
From Wikipedia ~
Process yellow (also known as pigment yellow, printer’s yellow or canary yellow) is one of the three colors typically used as subtractive primary colors, along with magenta and cyan. The CMYK system for color printing is based on using four inks, one of which is a yellow color. This is in itself a standard color, and a fairly narrow range of yellow inks or pigments are used. Process yellow is based on a colorant that reflects the preponderance of red and green light, and absorbs most blue light, as in the reflectance spectra shown in the figure on the lower right.
Process yellow is not an RGB color, and there is no fixed conversion from CMYK primaries to RGB. Different formulations are used for printer’s ink, so there can be variations in the printed color that is pure yellow ink