---input---
f'input={value:#06x}'

---tokens---
'f'           Literal.String.Affix
"'"           Literal.String.Single
'input='      Literal.String.Single
'{'           Literal.String.Interpol
'value'       Name
':'           Literal.String.Interpol
'#06x'        Literal.String.Single
'}'           Literal.String.Interpol
"'"           Literal.String.Single
'\n'          Text.Whitespace