Need help recognizing color blend algorithm

[NeverFall]

Been pondering and researching over these for days

I thought maybe it's just a linear interpolate but I wonder why the values are offset by 1-6 o.O

I can produce more data if anyone requests

fades from red(ff0000) to blue (0000ff)

#ff0000
#0000ff

<#ff0000>1</>    255,0,0

<#ff0000>1</>    255,0,0
<#0100fd>2</>    1,0,253

<#ff0000>1</>    255,0,0
<#81007d>2</>    129,0,125
<#0100fd>3</>    1,0,253

<#ff0000>1</>    255,0,0
<#ab0053>2</>    171,0,83
<#5700a7>3</>    87,0,167
<#0100fd>4</>    1,0,253

<#ff0000>1</>    255,0,0
<#c1003d>2</>    193,0,61
<#81007d>3</>    129,0,125
<#4100bd>4</>    65,0,189
<#0100fd>5</>    1,0,253

<#ff0000>1</>    255,0,0
<#cd0031>2</>    205,0,49
<#9b0063>3</>    155,0,99
<#670097>4</>    103,0,151
<#3500c9>5</>    53,0,201
<#0100fd>6</>    1,0,253

<#ff0000>1</>    255,0,0
<#d50029>2</>    213,0,41
<#ab0053>3</>    171,0,83
<#81007d>4</>    129,0,125
<#5700a7>5</>    87,0,167
<#2d00d1>6</>    45,0,209
<#0100fd>7</>    1,0,253    

<#ff0000>1</>    255,0,0
<#db0023>2</>    219,0,35
<#b70047>3</>    183,0,71
<#93006b>4</>    147,0,107
<#6f008f>5</>    111,0,143
<#4b00b3>6</>    75,0,179
<#2700d7>7</>    39,0,215
<#0100fd>8</>    1,0,253

<#ff0000>1</>    255,0,0
<#e1001d>2</>    225,0,29
<#c1003d>3</>    193,0,61
<#a1005d>4</>    161,0,93
<#81007d>5</>    129,0,125
<#61009d>6</>    97,0,157
<#4100bd>7</>    65,0,189
<#2100dd>8</>    33,0,221
<#0100fd>9</>    1,0,253

fades from red to green to blue

#ff0000
#00ff00
#0000ff

<color=#ff0000>1</>    255,0,0

<color=#ff0000>1</>    255,0,0
<color=#0003fb>2</>    0,3,251

<color=#ff0000>1</>    255,0,0
<color=#03fb00>2</>    3,251,0
<color=#0003fb>3</>    0,3,251

<color=#ff0000>1</>    255,0,0
<color=#57a700>2</>    87,167,0
<color=#00af4f>3</>    0,175,79
<color=#0003fb>4</>    0,3,251

<color=#ff0000>1</>    255,0,0
<color=#837b00>2</>    131,123,0
<color=#03fb00>3</>    3,251,0
<color=#00837b>4</>    0,131,123
<color=#0003fb>5</>    0,3,251

<color=#ff0000>1</>    255,0,0
<color=#9b6300>2</>    155,99,0
<color=#37c700>3</>    55,199,0
<color=#00cf2f>4</>    0,207,47
<color=#006b93>5</>    0,107,147
<color=#0003fb>6</>    0,3,251

<color=#ff0000>1</>    255,0,0
<color=#ab5300>2</>    171,83,0
<color=#57a700>3</>    87,167,0
<color=#03fb00>4</>    3,251,0
<color=#00af4f>5</>    0,175,79
<color=#005ba3>6</>    0,91,163
<color=#0003fb>7</>    0,3,251

[SlickHawk]

Edit: Ah, wait, I think I just now understood.

Actually, it may be a conversion to HSV and back for each iteration. I'm not sure the properties of something like that, but it seems likely.

[NeverFall]

in HLS with difference:

FF0000
0000FF
00FF00


RGB         HLS                 Diff

<ff0000>T</>    0,120,240
<f3000b>h</>    238,114,240        -238,6,0
<e70017>i</>    236,109,240        2,5,0
<db0023>s</>    234,103,240        2,6,0
<cf002f> </>    231,97,240        3,6,0
<c3003b>i</>    228,92,240        3,5,0
<b3004b>s</>    223,84,240        5,8,0
<a70057> </>    219,79,240        4,5,0
<9b0063>h</>    214,73,240        5,6,0
<8f006f>o</>    209,67,240        5,6,0
<83007b>w</>    202,62,240        7,5,0
<770087> </>    195,64,240        7,-2,0
<670097>y</>    187,71,240        8,-7,0
<5b00a3>o</>    182,77,240        5,-6,0
<4f00af>u</>    178,82,240        4,-5,0
<4300bb>r</>    174,88,240        4,-6,0
<3700c7> </>    171,94,240        3,-6,0
<2b00d3>m</>    168,99,240        3,-5,0
<1b00e3>e</>    165,107,240        3,-8,0
<0f00ef>s</>    163,112,240        2,-5,0
<0300fb>s</>    160,118,240        3,-6,0
<0007f7>a</>    159,116,240        1,2,0
<0013eb>g</>    157,111,240        2,5,0
<0023db>e</>    154,103,240        3,8,0
<002fcf> </>    151,97,240        3,6,0
<003bc3>t</>    148,92,240        3,5,0
<0047b7>e</>    144,86,240        4,6,0
<0053ab>x</>    141,80,240        3,6,0
<005f9f>t</>    136,75,240        5,5,0
<006f8f> </>    129,67,240        7,8,0
<007b83>w</>    122,62,240        7,5,0
<008777>i</>    115,64,240        7,-2,0
<00936b>l</>    109,69,240        6,-5,0
<009f5f>l</>    104,75,240        5,-6,0
<00ab53> </>    99,80,240        5,-5,0
<00bb43>a</>    94,88,240        5,-8,0
<00c737>p</>    91,94,240        3,-6,0
<00d32b>p</>    88,99,240        3,-5,0
<00df1f>e</>    86,105,240        2,-6,0
<00eb13>a</>    83,111,240        3,-6,0
<00fb03>r</>    80,118,240        3,-7,0