Add a constant for the colors in the Julia logo

docs/src/namedcolors.md

@@ -62,3 +62,16 @@ NamedColorCharts.ColorChartSVG("grays") # hide
     named colors. There are some unnatural definitions due to the different
     origins. For example, "LightGray" is lighter than "Gray", but "DarkGray" is
     also lighter than "Gray".
+
+## Julia logo colors
+[`Colors.JULIA_LOGO_COLORS`](@ref) is a `NamedTuple` containing the julia logo
+colors defined in the [julia-logo-graphics](https://github.com/JuliaLang/julia-logo-graphics#color-definitions).
+```@example julialogo
+using Colors # hide
+logocolors = Colors.JULIA_LOGO_COLORS
+showable(::MIME"text/plain", ::AbstractVector{C}) where {C<:Colorant} = false # hide
+[logocolors.blue, logocolors.red, logocolors.green, logocolors.purple]
+```
+```@docs
+Colors.JULIA_LOGO_COLORS
+```

src/parse.jl

@@ -226,3 +226,15 @@ end
     Base.depwarn("color(\"$str\") is deprecated, use colorant\"$str\" or parse(Colorant, \"$str\")", :color)
     parse(Colorant, str)
 end
+
+"""
+Colors used in the Julia logo as a `NamedTuple`.
+
+The keys are approximate descriptions of the hue and do not include black.
+
+Not exported, use as `JULIA_LOGO_COLORS.red` etc.
+"""
+const JULIA_LOGO_COLORS = (red = colorant"#cb3c33",
+                           green = colorant"#389826",
+                           blue = colorant"#4063d8",
+                           purple = colorant"#9558b2")