\setupbodyfont[plex,22pt]

\definecolor[colorscheme:1:1][h=002776]  % a
\definecolor[colorscheme:1:2][h=009c3b]  % b
\definecolor[colorscheme:1:3][h=17737e]  % c
\definecolor[colorscheme:1:4][h=ff5733]  % d
\definecolor[colorscheme:1:5][h=493367]  % e
\definecolor[colorscheme:1:6][h=7c6d11]  % f
\definecolor[colorscheme:1:7][h=117c2a]  % g
\definecolor[colorscheme:1:8][h=6d109d]  % h
\definecolor[colorscheme:1:9][h=08d11a]  % i
\definecolor[colorscheme:1:10][h=a81163] % j
\definecolor[colorscheme:1:11][h=7d2830] % k
\definecolor[colorscheme:1:12][h=2868d1] % l
\definecolor[colorscheme:1:13][h=2c11da] % m
\definecolor[colorscheme:1:14][h=cf47bb] % n
\definecolor[colorscheme:1:15][h=27bde2] % o
\definecolor[colorscheme:1:16][h=dc5777] % p
\definecolor[colorscheme:1:17][h=c28201] % q
\definecolor[colorscheme:1:18][h=ffdf00] % r
\definecolor[colorscheme:1:19][h=30a777] % s
\definecolor[colorscheme:1:20][h=722548] % t
\definecolor[colorscheme:1:21][h=ff00ff] % u
\definecolor[colorscheme:1:22][h=e0115f] % v
\definecolor[colorscheme:1:23][h=004c4c] % w
\definecolor[colorscheme:1:24][h=ae0001] % x
\definecolor[colorscheme:1:25][h=696966] % y
\definecolor[colorscheme:1:26][h=7bb3ff] % z

\definefontfeature
   [MyFeaturesA] [default]
   [goodies={colorfont},colorscheme=default]

\definefont[MyFontA][SerifBold*MyFeaturesA]

\starttext

\setfontcolorscheme[1]
\MyFontA
\startlines
aàáâãäå AÀÁÂÃÄÅ
eèéêë EÈÉÊË
iìíîï IÌÍÎÏ
oòóôõö OÒÓÔÕÖ
uùúûü UÙÚÛÜ

\stoptext