Debugging black/black issue with Frame.js

test.js

load("sbbsdefs.js");
load("frame.js");

// COLOR CODES
var lowRed = '\1N\1R\10';
var lowBlue = '\1N\1B\10';
var lowWhite = '\1N\1W\10';
var highCyan = '\1H\1C\10';
var lowBlack = '\1N\1K\10';
var highBlack = '\1H\1K\10';

console.clear();

// PLAIN CONSOLE VERSION
console.gotoxy(1,1);
console.putmsg(lowWhite + 'PLAIN CONSOLE VERSION');
mswait(4000);
console.gotoxy(1,1);
console.putmsg(lowBlue + 'TEST1 TEST1' + highBlack + ' ... should say TEST1 TEST1 in low blue on black   ');
mswait(4000);
console.gotoxy(1,1);
console.putmsg(lowBlack + 'TEST2 TEST2' + highBlack + ' ... should say TEST2 TEST2 in black on black     ');
mswait(4000);
console.gotoxy(1,1);
console.putmsg(highCyan + 'TEST3 TEST3' + highBlack + ' ... should say TEST3 TEST3 in high cyan on black ');
mswait(4000);


// FRAME VERSION
testFrame = new Frame(1, 1, 80, 24, BG_BLACK);
testFrame.open();
testFrame.draw();
testFrame.gotoxy(1,1);
testFrame.putmsg(lowWhite + 'FRAME.JS VERSION');
testFrame.cycle();
mswait(4000);
testFrame.gotoxy(1,1);
testFrame.putmsg(lowBlue + 'TEST1 TEST1' + highBlack + ' ... should say TEST1 TEST1 in low blue on black    ');
testFrame.cycle();
mswait(4000);
testFrame.gotoxy(1,1);
testFrame.putmsg(lowBlack + 'TEST2 TEST2' + highBlack + ' ... should say TEST2 TEST2 in black on black     ');
testFrame.cycle();
mswait(4000);
testFrame.gotoxy(1,1);
testFrame.putmsg(highCyan + 'TEST3 TEST3' + highBlack + ' ... should say TEST3 TEST3 in high cyan on black ');
testFrame.cycle();
mswait(4000);