Avail key?
Dm: @NobleHamza

local chromo = {}

local function HSVtoRGB(h, s, v)
  local r, g, b
  local i = math.floor(h * 6)
  local f = h * 6 - i
  local p = v * (1 - s)
  local q = v * (1 - f * s)
  local t = v * (1 - (1 - f) * s)
  i = i % 6
  if i == 0 then r, g, b = v, t, p
  elseif i == 1 then r, g, b = q, v, p
  elseif i == 2 then r, g, b = p, v, t
  elseif i == 3 then r, g, b = p, q, v
  elseif i == 4 then r, g, b = t, p, v
  else r, g, b = v, p, q end
  return r, g, b
end

function chromo.getColor(speed, offset, sat, val)
  speed = speed or 1.0
  offset = offset or 0.0
  sat = sat or 1.0
  val = val or 1.0
  local t = (os.clock() * speed + offset) % 1.0
  local r, g, b = HSVtoRGB(t, sat, val)
  return math.floor(r * 255), math.floor(g * 255), math.floor(b * 255)
end

function chromo.toHex(speed, offset, sat, val)
  local r, g, b = chromo.getColor(speed, offset, sat, val)
  return string.format("#%02X%02X%02X", r, g, b)
end

function chromo.toDecimal(speed, offset, sat, val)
  local r, g, b = chromo.getColor(speed, offset, sat, val)
  return 0xFF000000 + r * 0x10000 + g * 0x100 + b
end

function chromo.toLuaColor(speed, offset, sat, val)
  local r, g, b = chromo.getColor(speed, offset, sat, val)
  return string.format("0xFF%02X%02X%02X", r, g, b)
end

return chromo