Added Intern and Intern2 (darker background), based on https://github.com/drzel/intern-hexchat-theme

Code:
[colors]
n0=Dracula,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,14,6,1,1,0
n1=DraculaGr,1,6,4,5,2,3,3,3,3,3,3,15,5,7,6,15,3,2,3,5,15,1,0,1,15,14,6,1,1,15
n2=HexChat Black,1,6,4,7,11,3,3,3,3,3,3,15,7,8,6,15,3,11,3,7,15,1,15,1,15,14,6,1,1,15
n3=HexChat Black2,1,6,4,7,11,3,3,3,3,3,3,15,7,8,6,15,3,11,3,7,15,1,15,1,15,14,6,1,1,15
n4=HexChat Cool,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,15,6,1,1,0
n5=HexChat MatriY,0,6,4,5,2,3,3,3,3,3,3,1,5,7,6,1,3,2,3,5,1,0,1,0,1,3,6,0,0,1
n6=HexChat Monokai,1,6,4,7,11,3,3,3,3,3,3,15,7,8,6,15,3,11,3,7,15,1,15,1,15,14,6,1,1,15
n7=HexChat Simply Glyphed Tango Dark,14,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,14,0,14,0,15,6,14,14,0
n8=HexChat Solarized Dark,11,6,4,7,15,3,3,3,3,3,3,15,7,8,6,15,3,15,3,7,15,11,15,11,15,14,6,11,11,15
n9=HexChat Ubuntu Dark,14,6,4,7,11,5,5,5,5,5,5,15,7,8,6,15,5,11,5,7,15,14,15,14,15,5,6,14,14,15
n10=Intern,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,15,6,1,1,0
n11=Intern2,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,15,6,1,1,0
n12=mIRC Black,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,15,6,1,1,0
n13=mIRC BlackGr,1,6,4,5,2,3,3,3,3,3,3,15,5,7,6,15,3,2,3,5,15,1,15,1,15,14,6,1,1,15
n14=mIRC Classic,0,6,4,5,2,3,3,3,3,3,3,1,5,7,6,1,3,2,3,5,1,0,1,0,1,15,6,0,0,1
n15=mIRC Modern,0,6,4,7,2,3,4,3,3,3,3,1,5,2,6,1,14,2,3,5,1,0,1,0,1,14,5,0
n16=mmIRCB1,1,6,4,7,11,3,3,3,3,3,3,0,7,8,6,0,3,11,3,7,0,1,0,1,0,14,6,1,1,0
n17=mmIRCB1Gr,1,6,4,7,11,3,3,3,3,3,3,15,7,8,6,15,3,11,3,7,15,1,15,1,15,14,6,1,1,15
n18=mmIRCB2,1,6,4,7,2,3,3,3,3,3,3,0,7,8,6,0,3,2,3,7,0,1,0,1,0,14,6,1,1,0
n19=mmIRCB2Gr,1,6,4,7,2,3,3,3,3,3,3,15,7,8,6,15,3,2,3,7,15,1,15,1,15,14,6,1,1,15
n20=mmIRCB3,1,6,4,7,11,3,3,3,3,3,3,0,7,8,6,0,3,11,3,7,0,1,0,1,0,14,6,1,1,0
n21=mmIRCB3Gr,1,6,4,7,11,3,3,3,3,3,3,15,7,8,6,15,3,11,3,7,15,1,15,1,15,14,6,1,1,15
n22=mmIRCB4,1,6,4,7,11,9,9,9,9,9,9,0,7,8,6,0,9,11,9,7,0,1,0,1,0,14,6,1,1,0
n23=mmIRCB4Gr,1,6,4,7,11,9,9,9,9,9,9,15,7,8,6,15,9,11,9,7,15,1,15,1,15,14,6,1,1,15
n24=mmIRCBl,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,1,0
n25=mmIRCBl2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,1,0
n26=mmIRCG3,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,1,3,3,3,1,1,3
n27=mmIRCG32,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,1,3,3,3,1,1,3
n28=mmIRCG9,1,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,1,9,1,9,9,9,1,1,9
n29=mmIRCG92,1,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,1,9,1,9,9,9,1,1,9
n30=mmIRCGr,1,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,1,15,1,15,15,15,1,1,15
n31=mmIRCGr2,1,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,1,15,1,15,15,15,1,1,15
n32=mmIRCO,1,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,1,7,1,7,7,7,1,1,7
n33=mmIRCO2,1,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,1,7,1,7,7,7,1,1,7
n34=mmIRCWh,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,1,0,0,1
n35=mmIRCWh2,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,1,0,0,1
n36=Monochrome State,1,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,1,15,1,15,15,15,14,1,15
n37=Monochrome State2,1,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,1,15,1,15,15,15,14,1,15
n38=Monokai,1,4,4,4,2,3,4,3,6,6,3,0,2,2,0,0,3,4,3,4,0,1,0,1,0,14,0,1,1,0
n39=Monokai2,1,13,4,7,2,3,3,3,3,3,3,0,7,6,13,0,3,2,3,7,0,1,0,1,0,14,0,1,1,0
n40=Monokai2Dark,1,13,4,7,2,3,3,3,3,3,3,0,7,6,13,0,3,2,3,7,0,1,0,1,0,14,0,1,1,0
n41=Monokai2Gr,1,13,4,7,2,3,3,3,3,3,3,15,7,6,13,15,3,2,3,7,15,1,15,1,15,14,15,1,1,15
n42=Monokai2GrDark,1,13,4,7,2,3,3,3,3,3,3,15,7,6,13,15,3,2,3,7,15,1,15,1,15,14,15,1,1,15
n43=MonokaiDark,1,4,4,4,2,3,4,3,6,6,3,0,2,2,0,0,3,4,3,4,0,1,0,1,0,14,0,1,1,0
n44=MonokaiGr,1,4,4,4,2,3,4,3,6,6,3,15,2,2,15,15,3,4,3,4,15,1,15,1,15,14,15,1,1,15
n45=MonokaiGrDark,1,4,4,4,2,3,4,3,6,6,3,15,2,2,15,15,3,4,3,4,15,1,15,1,15,14,15,1,1,15
n46=Placid Hues,0,2,4,7,2,3,3,3,3,15,3,1,5,7,6,1,3,2,3,5,1,0,1,0,1,15,6,0
n47=Rainbow Sky,0,7,4,5,1,1,3,3,8,13,3,14,2,7,13,5,3,8,3,4,14,0,5,0,3,14,10,0,0,1
n48=Solarized,1,15,10,9,8,8,8,15,11,11,15,6,9,9,7,6,15,15,11,11,15,1,6,1,7,7,15,1,1,15
n49=Tempesta,1,4,4,4,2,3,4,3,6,6,3,0,2,2,5,0,5,4,3,4,0,1,0,1,0,14,5,1,1,0
n50=Tempesta2,1,6,4,8,2,3,3,3,3,3,3,0,8,7,6,0,3,2,3,8,0,1,0,1,0,14,6,1,1,0
n51=Wad's Black,1,6,4,5,2,3,3,3,3,3,3,0,5,7,6,0,3,2,3,5,0,1,0,1,0,15,6,1,1,0
n52=Wad's BlackGr,1,6,4,5,2,3,3,3,3,3,3,15,5,7,6,15,3,2,3,5,15,1,15,1,15,14,6,1,1,15
n53=Wad's BlackGr2,1,6,4,5,2,3,3,3,3,3,3,15,5,7,6,15,3,2,3,5,15,1,15,1,15,14,6,1,1,15
n54=Wad's White,0,6,4,5,2,3,3,3,3,3,3,1,5,7,6,1,3,2,3,5,1,0,1,0,1,15,6,0,0,1
n55=Zenburn,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,12,7,7,5,4,13,1,12,1,3,8,10,1,1,14
n56=Zenburn2,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,0,7,7,5,4,13,1,0,1,3,8,10,1,1,14
n57=Zenburn2Dark,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,0,7,7,5,4,13,1,0,1,3,8,10,1,1,14
n58=Zenburn2Darker,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,0,7,7,5,4,13,1,0,1,3,8,10,1,1,14
n59=ZenburnDark,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,12,7,7,5,4,13,1,12,1,3,8,10,1,1,14
n60=ZenburnDarker,1,11,4,10,14,14,15,3,2,6,11,0,4,15,9,12,7,7,5,4,13,1,12,1,3,8,10,1,1,14

[palettes]
n0=15066597,0,16356285,8125008,5592575,5592575,13007359,7125247,9239281,8125008,16640395,16640395,16356285,13007359,11711154,13421772
n1=15066597,0,16356285,8125008,5592575,5592575,13007359,7125247,9239281,8125008,16640395,16640395,16356285,13007359,11711154,13421772
n2=13553358,0,13369344,52225,220,170,12255418,43775,2350575,5561907,13356032,16772659,16646144,15606509,7829367,10066329
n3=13553358,0,13790720,52225,220,170,12255418,43775,2350575,5561907,13356032,16772659,16744448,15606509,7829367,10066329
n4=15329769,0,15306514,2853931,1398002,1532660,8267647,8948363,4237015,4115517,5592345,7638062,14959684,11548593,16777215,9803157
n5=14672094,1144855,8441734,8894333,7330405,6356065,4848506,38924,6087168,10419972,7369839,2227458,7700339,10343597,14212305,14869218
n6=16777215,4081736,15653222,2934636,2136062,7481338,16668819,6189430,7724007,3072679,9482038,14020454,15653222,16745134,6189430,12767439
n7=16777215,0,8866080,367182,164,2763247,10057107,22927,5237244,3465866,10839604,8081525,13533042,11042477,5396309,11976122
n8=10592659,1461194,13863718,10068521,12808556,8599251,13863718,12808556,3093211,35509,8599251,7630423,39557,1461194,35509,1461194
n9=8043737,6192795,9843456,4744833,78845,2926565,212,300028,3667444,616953,13265153,16768691,16684802,5547467,4674134,10213885
n10=16777215,1842204,14135183,6260575,6250415,6260615,8871775,6197437,9227468,8892295,11503455,11513695,8882015,11503495,7039851,10066329
n11=16777215,1579032,14135183,6260575,6250415,6260615,8871775,6197437,9227468,8892295,11503455,11513695,8882015,11503495,7039851,10066329
n12=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n13=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n14=16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530
n15=16777215,0,11010048,3299627,240,4737160,8388720,26832,1632504,57344,94740,16776960,16515072,16711935,8355711,13816530
n16=16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530
n17=16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530
n18=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n19=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n20=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n21=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n22=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n23=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n24=16777215,0,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215,16777215
n25=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n26=37632,0,37632,37632,37632,37632,37632,37632,37632,37632,37632,37632,37632,37632,37632,37632
n27=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n28=65280,0,65280,65280,65280,65280,65280,65280,65280,65280,65280,65280,65280,65280,65280,65280
n29=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n30=13816530,0,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530,13816530
n31=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n32=33023,0,33023,33023,33023,33023,33023,33023,33023,33023,33023,33023,33023,33023,33023,33023
n33=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n34=16777215,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
n35=16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530
n36=16777215,0,8323072,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16515072,16711935,8355711,13816530
n37=16777215,0,12615680,37632,255,127,10223772,32764,65535,64512,9671424,16776960,16744448,16711935,8355711,13816530
n38=15923448,2238503,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n39=15923448,2238503,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n40=15923448,1711645,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n41=15923448,2238503,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n42=15923448,1711645,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n43=15923448,1711645,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n44=15923448,2238503,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n45=15923448,1711645,15718758,3072678,7481081,12767183,2070525,26832,1632504,57344,94740,16776960,16744448,16711935,8355711,13816530
n46=15658734,0,12140,1508038,255,10964547,6579262,33023,65535,4227072,9474048,9920537,16711680,16711935,6579300,8553090
n47=16777215,3618615,12087408,16744448,255,32764,65535,43008,9671424,16776960,16515072,16711935,8355711,16711808,8355711,13816530
n48=4339207,3549952,7695960,8616805,9868419,10592659,14018798,14939901,35253,1461195,3093212,8533715,12874092,13798182,10002730,39301
n49=15395562,1579032,15246675,4774912,3093751,3394288,13988301,22764,4941506,1429027,11524683,15173652,14279428,16734975,9608092,6779250
n50=15395562,1579032,15246675,4774912,3093751,3394288,13988301,22764,4941506,1429027,11524683,15173652,14279428,16734975,9608092,6779250
n51=16777215,0,14109482,1337629,2302893,1657473,12592769,3379967,3403519,8045953,12312297,13684777,16756637,15977983,5723991,10526880
n52=16777215,0,14109482,1337629,2302893,1657473,12592769,3379967,3403519,8045953,12312297,13684777,16756637,15977983,5723991,10526880
n53=16777215,0,14109482,1337629,2302893,1657473,12592769,3379967,3403519,8045953,12312297,13684777,16756637,15977983,5723991,11842740
n54=16777215,0,14109482,1337629,2302893,1657473,12592769,3379967,3403519,8045953,12312297,13684777,16756637,15977983,5723991,10526880
n55=13027014,3815994,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593
n56=13027014,3815994,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593
n57=13027014,2631720,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593
n58=13027014,1579032,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593
n59=13027014,2631720,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593
n60=13027014,1579032,2627742,9621166,3705494,13594205,5848214,7962945,12500670,6710886,7430607,7993285,9893887,12486209,12492495,12500593