One of the five shades of electric_indigo. The number is a percent of the original color, ranging from 100 (100%) down to 20 (20%) at 20% intervals. The lower the number, the lighter the tint of the original color.
See also
Other SIEI tints:
electric_indigo_100,
electric_indigo_20,
electric_indigo_40,
electric_indigo_80,
hunter_100,
hunter_20,
hunter_40,
hunter_60,
hunter_80,
lavender_haze_100,
lavender_haze_20,
lavender_haze_40,
lavender_haze_60,
lavender_haze_80,
midnight_blue_100,
midnight_blue_20,
midnight_blue_40,
midnight_blue_60,
midnight_blue_80,
orchid_bloom_100,
orchid_bloom_20,
orchid_bloom_40,
orchid_bloom_60,
orchid_bloom_80,
slate_100,
slate_20,
slate_40,
slate_60,
slate_80,
sun_kissed_100,
sun_kissed_20,
sun_kissed_40,
sun_kissed_60,
sun_kissed_80,
tango_100,
tango_20,
tango_40,
tango_60,
tango_80,
viking_100,
viking_20,
viking_40,
viking_60,
viking_80