utf8get←{                               ⍝ Char vector from UTF-8 file ⍵.
    0::⎕SIGNAL ⎕EN                      ⍝ signal error to caller.
    tie←⍵ ⎕NTIE 0                       ⍝ file handle.
    ints←⎕NREAD tie 83,⎕NSIZE tie       ⍝ all UTF-8 file bytes.
    ('UTF-8'⎕UCS 256|ints)⊣⎕NUNTIE tie  ⍝ ⎕AV chars.
}
code_colours

test script

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