chore(colors: contributed): create BWnB (themix-project#275)

Black theme for amoled screens, with blue for highlights and selections.
PS : BWnB - Black White and Blue

colors/Contributed/BWnB

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+ACCENT_BG=1688f0
+ARC_TRANSPARENCY=True
+ARC_WIDGET_BORDER_COLOR=05050a
+BASE16_GENERATE_DARK=False
+BASE16_INVERT_TERMINAL=False
+BASE16_MILD_TERMINAL=False
+BG=000000
+BTN_BG=0f0f14
+BTN_FG=d3dae3
+BTN_OUTLINE_OFFSET=-3
+BTN_OUTLINE_WIDTH=1
+CARET1_FG=e6e6e6
+CARET2_FG=e6e6e6
+CARET_SIZE=0.04
+CINNAMON_OPACITY=1.0
+FG=ffffff
+GRADIENT=0.0
+GTK3_GENERATE_DARK=True
+HDR_BG=000000
+HDR_BTN_BG=0a0a0f
+HDR_BTN_FG=d3dae3
+HDR_FG=ffffff
+ICONS_ARCHDROID=dddddd
+ICONS_DARK=ffffff
+ICONS_LIGHT=5294e2
+ICONS_LIGHT_FOLDER=1688f0
+ICONS_MEDIUM=3e628d
+ICONS_NUMIX_STYLE=5
+ICONS_STYLE=numix_icons
+ICONS_SYMBOLIC_ACTION=d3dae3
+ICONS_SYMBOLIC_PANEL=d3dae3
+MATERIA_PANEL_OPACITY=0.6
+MATERIA_SELECTION_OPACITY=0.32
+MATERIA_STYLE_COMPACT=True
+MENU_BG=303641
+MENU_FG=d3dae3
+NAME=Modern/BWnB
+OUTLINE_WIDTH=1
+ROUNDNESS=3
+SEL_BG=2285e2
+SEL_FG=ffffff
+SPACING=2
+SPOTIFY_PROTO_BG=000000
+SPOTIFY_PROTO_FG=ffffff
+SPOTIFY_PROTO_SEL=1688f0
+SURUPLUS_GRADIENT1=d3dae3
+SURUPLUS_GRADIENT2=5294e2
+SURUPLUS_GRADIENT_ENABLED=False
+TERMINAL_ACCENT_COLOR=2285e2
+TERMINAL_BACKGROUND=0a0a0f
+TERMINAL_BASE_TEMPLATE=basic
+TERMINAL_COLOR0=0a0a0f
+TERMINAL_COLOR1=932900
+TERMINAL_COLOR10=00ff00
+TERMINAL_COLOR11=c5ff00
+TERMINAL_COLOR12=2285e2
+TERMINAL_COLOR13=c529e2
+TERMINAL_COLOR14=00ffe2
+TERMINAL_COLOR15=d3dae3
+TERMINAL_COLOR2=00f600
+TERMINAL_COLOR3=93f600
+TERMINAL_COLOR4=0029d1
+TERMINAL_COLOR5=9329b0
+TERMINAL_COLOR6=00f6b0
+TERMINAL_COLOR7=bac1ca
+TERMINAL_COLOR8=8a8a8f
+TERMINAL_COLOR9=c52900
+TERMINAL_FOREGROUND=d3dae3
+TERMINAL_THEME_ACCURACY=122
+TERMINAL_THEME_AUTO_BGFG=False
+TERMINAL_THEME_EXTEND_PALETTE=False
+TERMINAL_THEME_MODE=auto
+THEME_STYLE=arc
+TXT_BG=0a0a0f
+TXT_FG=d3dae3
+UNITY_DEFAULT_LAUNCHER_STYLE=False
+WM_BORDER_FOCUS=303641
+WM_BORDER_UNFOCUS=303641