ANSI Color Code Generator: Build Terminal Escape Sequences Visually

Stop memorizing ANSI escape sequences. I built a browser tool to generate them visually — pick colors, styles, and get the code ready to paste. Try it 🔗 ANSI Color Code Generator — DevNestio Features 3 color modes : 8-color, 256-color palette, RGB truecolor (24-bit) 8 text styles : Bold, Dim, Italic, Underline, Blink, Reverse, Hidden, Strikethrough Separate FG/BG : Set foreground and background colors independently 3 output formats : Shell ( echo -e ), Python ( print ), Raw escape sequence Live preview in a simulated terminal box How ANSI sequences work ESC [ <codes> m Multiple codes are separated by ; . Reset is ESC[0m . 8-color : codes 30-37 (FG), 40-47 (BG), 90-97 (bright FG) 256-color : ESC[38;5;<0-255>m for FG, ESC[48;5;<0-255>m for BG RGB truecolor : ESC[38;2;<R>;<G>;<B>m 256-color palette calculation function get256Color ( i ) { if ( i < 16 ) return standardColors [ i ]. hex ; if ( i < 232 ) { const n = i - 16 ; const r = Math . floor ( n / 36 ) * 51 ; // 255/5 = 51 const g = Math . floor (( n % 36 ) / 6 ) * 51 ; const b = ( n % 6 ) * 51 ; return `rgb( ${ r } , ${ g } , ${ b } )` ; } const v = ( i - 232 ) * 10 + 8 ; // 24 grayscale steps return `rgb( ${ v } , ${ v } , ${ v } )` ; } Output examples # Bold red text on black echo -e " \e [1;31mHello, Terminal! \e [0m" # RGB orange (Python) print ( " \0 33[38;2;255;128;0mOrange text \0 33[0m" ) Tested with 128 assertions covering code generation, color math, and format strings. Part of DevNestio — 115 free browser-only developer tools.