This is default Redguard's palette (RedguardfxartRedguard.col).

RedguardPalette: TPalette24Size256 = ( (B: 0; G: 0; R: 0), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 255; G: 0; R: 255), (B: 133; G: 196; R: 183), (B: 100; G: 181; R: 153), (B: 66; G: 165; R: 124), (B: 33; G: 150; R: 94), (B: 31; G: 139; R: 87), (B: 28; G: 127; R: 80), (B: 26; G: 116; R: 73), (B: 24; G: 105; R: 66), (B: 21; G: 93; R: 59), (B: 19; G: 82; R: 52), (B: 17; G: 71; R: 45), (B: 14; G: 59; R: 38), (B: 12; G: 48; R: 31), (B: 10; G: 37; R: 24), (B: 7; G: 25; R: 17), (B: 5; G: 14; R: 10), (B: 230; G: 179; R: 142), (B: 216; G: 155; R: 127), (B: 199; G: 151; R: 136), (B: 205; G: 134; R: 118), (B: 199; G: 131; R: 103), (B: 191; G: 130; R: 108), (B: 202; G: 113; R: 95), (B: 180; G: 112; R: 94), (B: 197; G: 95; R: 78), (B: 183; G: 106; R: 78), (B: 174; G: 96; R: 75), (B: 160; G: 91; R: 63), (B: 166; G: 84; R: 55), (B: 151; G: 91; R: 54), (B: 152; G: 75; R: 49), (B: 142; G: 81; R: 51), (B: 216; G: 227; R: 162), (B: 155; G: 212; R: 109), (B: 95; G: 198; R: 57), (B: 34; G: 183; R: 4), (B: 32; G: 169; R: 4), (B: 29; G: 155; R: 4), (B: 27; G: 141; R: 4), (B: 25; G: 127; R: 4), (B: 22; G: 113; R: 4), (B: 20; G: 100; R: 4), (B: 18; G: 86; R: 3), (B: 15; G: 72; R: 3), (B: 13; G: 58; R: 3), (B: 11; G: 44; R: 3), (B: 8; G: 30; R: 3), (B: 6; G: 16; R: 3), (B: 134; G: 72; R: 57), (B: 132; G: 71; R: 47), (B: 122; G: 75; R: 51), (B: 123; G: 61; R: 44), (B: 119; G: 59; R: 37), (B: 103; G: 55; R: 41), (B: 104; G: 47; R: 31), (B: 98; G: 47; R: 27), (B: 91; G: 45; R: 33), (B: 83; G: 42; R: 34), (B: 75; G: 40; R: 24), (B: 80; G: 33; R: 22), (B: 63; G: 29; R: 24), (B: 66; G: 24; R: 16), (B: 51; G: 27; R: 24), (B: 40; G: 24; R: 24), (B: 255; G: 246; R: 103), (B: 241; G: 238; R: 45), (B: 235; G: 247; R: 0), (B: 228; G: 228; R: 3), (B: 204; G: 207; R: 1), (B: 189; G: 187; R: 2), (B: 173; G: 166; R: 2), (B: 158; G: 146; R: 3), (B: 142; G: 126; R: 3), (B: 127; G: 106; R: 4), (B: 114; G: 97; R: 9), (B: 96; G: 81; R: 7), (B: 75; G: 63; R: 6), (B: 53; G: 47; R: 6), (B: 35; G: 31; R: 6), (B: 19; G: 18; R: 6), (B: 184; G: 116; R: 83), (B: 175; G: 96; R: 57), (B: 166; G: 75; R: 30), (B: 157; G: 55; R: 4), (B: 145; G: 51; R: 4), (B: 133; G: 47; R: 4), (B: 122; G: 43; R: 4), (B: 110; G: 39; R: 3), (B: 98; G: 35; R: 3), (B: 86; G: 31; R: 3), (B: 74; G: 26; R: 3), (B: 62; G: 22; R: 3), (B: 51; G: 18; R: 3), (B: 39; G: 14; R: 2), (B: 27; G: 10; R: 2), (B: 15; G: 6; R: 2), (B: 255; G: 255; R: 184), (B: 255; G: 241; R: 137), (B: 255; G: 226; R: 90), (B: 255; G: 212; R: 43), (B: 240; G: 189; R: 39), (B: 225; G: 166; R: 35), (B: 211; G: 144; R: 30), (B: 196; G: 121; R: 26), (B: 181; G: 98; R: 22), (B: 163; G: 92; R: 20), (B: 127; G: 73; R: 15), (B: 105; G: 60; R: 13), (B: 83; G: 46; R: 12), (B: 61; G: 33; R: 10), (B: 39; G: 20; R: 8), (B: 26; G: 15; R: 9), (B: 252; G: 203; R: 179), (B: 245; G: 189; R: 158), (B: 222; G: 167; R: 133), (B: 196; G: 147; R: 111), (B: 186; G: 134; R: 91), (B: 174; G: 125; R: 81), (B: 161; G: 118; R: 78), (B: 147; G: 110; R: 72), (B: 136; G: 102; R: 65), (B: 122; G: 93; R: 59), (B: 110; G: 85; R: 55), (B: 98; G: 79; R: 53), (B: 85; G: 69; R: 46), (B: 66; G: 54; R: 37), (B: 46; G: 40; R: 29), (B: 27; G: 25; R: 20), (B: 228; G: 133; R: 133), (B: 225; G: 96; R: 94), (B: 222; G: 58; R: 55), (B: 219; G: 21; R: 16), (B: 202; G: 20; R: 15), (B: 185; G: 18; R: 14), (B: 167; G: 17; R: 13), (B: 150; G: 16; R: 12), (B: 133; G: 14; R: 11), (B: 116; G: 13; R: 11), (B: 98; G: 12; R: 10), (B: 81; G: 10; R: 9), (B: 64; G: 9; R: 8), (B: 47; G: 8; R: 7), (B: 29; G: 6; R: 6), (B: 12; G: 5; R: 5), (B: 255; G: 255; R: 255), (B: 240; G: 240; R: 240), (B: 220; G: 220; R: 220), (B: 201; G: 201; R: 201), (B: 181; G: 181; R: 181), (B: 162; G: 162; R: 162), (B: 148; G: 148; R: 148), (B: 135; G: 135; R: 135), (B: 121; G: 121; R: 121), (B: 108; G: 108; R: 108), (B: 90; G: 90; R: 90), (B: 74; G: 74; R: 74), (B: 58; G: 58; R: 58), (B: 42; G: 42; R: 42), (B: 22; G: 22; R: 22), (B: 8; G: 8; R: 8), (B: 104; G: 150; R: 233), (B: 93; G: 125; R: 242), (B: 82; G: 98; R: 249), (B: 72; G: 72; R: 255), (B: 48; G: 48; R: 255), (B: 25; G: 25; R: 254), (B: 7; G: 7; R: 246), (B: 7; G: 7; R: 220), (B: 6; G: 6; R: 194), (B: 6; G: 6; R: 169), (B: 5; G: 5; R: 143), (B: 5; G: 5; R: 117), (B: 4; G: 4; R: 91), (B: 4; G: 4; R: 66), (B: 3; G: 3; R: 40), (B: 3; G: 3; R: 14), (B: 191; G: 88; R: 117), (B: 180; G: 63; R: 97), (B: 169; G: 38; R: 78), (B: 159; G: 14; R: 56), (B: 147; G: 13; R: 52), (B: 135; G: 12; R: 48), (B: 123; G: 12; R: 44), (B: 111; G: 11; R: 40), (B: 99; G: 10; R: 36), (B: 87; G: 9; R: 32), (B: 75; G: 8; R: 27), (B: 63; G: 7; R: 23), (B: 51; G: 7; R: 19), (B: 39; G: 6; R: 15), (B: 27; G: 5; R: 11), (B: 15; G: 4; R: 7), (B: 135; G: 224; R: 255), (B: 91; G: 213; R: 255), (B: 46; G: 197; R: 255), (B: 2; G: 184; R: 255), (B: 2; G: 170; R: 235), (B: 2; G: 156; R: 215), (B: 2; G: 141; R: 195), (B: 2; G: 127; R: 175), (B: 2; G: 113; R: 155), (B: 3; G: 99; R: 136), (B: 3; G: 84; R: 116), (B: 3; G: 70; R: 96), (B: 3; G: 56; R: 76), (B: 3; G: 42; R: 56), (B: 3; G: 27; R: 36), (B: 3; G: 13; R: 16), (B: 254; G: 255; R: 199), (B: 254; G: 235; R: 170), (B: 255; G: 215; R: 141), (B: 255; G: 205; R: 127), (B: 255; G: 195; R: 112), (B: 255; G: 175; R: 83), (B: 234; G: 155; R: 50), (B: 219; G: 131; R: 43), (B: 205; G: 107; R: 35), (B: 190; G: 84; R: 27), (B: 176; G: 60; R: 19), (B: 155; G: 24; R: 10), (B: 130; G: 21; R: 9), (B: 105; G: 19; R: 8), (B: 80; G: 16; R: 7), (B: 55; G: 13; R: 6), (B: 197; G: 215; R: 255), (B: 181; G: 196; R: 233), (B: 165; G: 177; R: 212), (B: 149; G: 158; R: 190), (B: 138; G: 146; R: 176), (B: 126; G: 134; R: 162), (B: 115; G: 122; R: 147), (B: 103; G: 110; R: 133), (B: 92; G: 98; R: 119), (B: 81; G: 87; R: 105), (B: 69; G: 75; R: 90), (B: 58; G: 63; R: 76), (B: 46; G: 51; R: 62), (B: 35; G: 39; R: 48), (B: 23; G: 27; R: 33), (B: 12; G: 15; R: 19));

ElderImagery (at line 183)

It is default palette for BSI image file format.