Spring bud is the color

Color

Color or colour is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light interacting in the eye with the spectral sensitivities of the light receptors...

 that used to be called spring green before the X11 web color spring green

Spring green (color)

Spring green is a color included on the color wheel that is precisely halfway between cyan and green . When plotted on the CIE chromaticity diagram it corresponds to a visual stimulus of 505 nanometers on the visible spectrum. Spring green is a pure chroma on the color wheel...

 was formulated in 1987 when the X11 colors

X11 color names

In computing, on the X Window System, X11 color names are represented in a simple text file, which maps certain strings to RGB color values. It is shipped with every X11 installation, hence the name, and is usually located in <X11root>/lib/X11/rgb.txt.It is not known who originally compiled...

 were first promulgated. This color is now called spring bud to avoid confusion with the web color.

The color spring bud is also called soft spring green.

The first recorded use of spring green as a color name in English

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 (meaning the color that is now called spring bud) was in 1766.

June bud

At right is the less saturated color june bud.

The source of this color is the following website, the ISCC-NBS Dictionary of Color Names (1955) (a site for stamp collectors to identify the colors of their stamps)--Color Sample of June Bud (color sample #116):
http://tx4.us/nbs/nbs-j.htm

Medium spring bud

At right is displayed the medium tone of spring bud that is called "spring bud" on the ISCC-NBS color list.

The source of this color is the following website, the ISCC-NBS Dictionary of Color Names (1955) (a site for stamp collectors to identify the colors of their stamps)--Color Sample of Spring Bud (color sample #119):
http://tx4.us/nbs/nbs-s.htm

Pale spring bud

This pale tone of spring bud is the color called spring green in Crayola

Crayola

Crayola is a brand of artists' supplies manufactured by Crayola LLC, which was founded in 1885 as Binney & Smith. It is best known for its crayons...

 crayon

Crayon

A crayon is a stick of colored wax, charcoal, chalk, or other materials used for writing, coloring, drawing, and other methods of illustration. A crayon made of oiled chalk is called an oil pastel; when made of pigment with a dry binder, it is simply a pastel; both are popular media for color...

s.
(See spring green on the List of Crayola crayon colors).

Spring bud in human culture

Horticulture

Horticulture

Horticulture is the industry and science of plant cultivation including the process of preparing soil for the planting of seeds, tubers, or cuttings. Horticulturists work and conduct research in the disciplines of plant propagation and cultivation, crop production, plant breeding and genetic...

• The color spring bud is representative of and brings to mind the young buds of growing vegetation in early spring, and thus it is associated with new life
  Life
  Life is a characteristic that distinguishes objects that have signaling and self-sustaining processes from those that do not, either because such functions have ceased , or else because they lack such functions and are classified as inanimate...
  
  .