My take on solarized waybar

waybar solarized.css

/* List of colors */

/* {
    --base03:    #002b36;
    --base02:    #073642;
    --base01:    #586e75;
    --base00:    #657b83;
    --base0:     #839496;
    --base1:     #93a1a1;
    --base2:     #eee8d5;
    --base3:     #fdf6e3;
    --yellow:    #b58900;
    --orange:    #cb4b16;
    --red:       #dc322f;
    --magenta:   #d33682;
    --violet:    #6c71c4;
    --blue:      #268bd2;
    --cyan:      #2aa198;
    --green:     #859900;
} */

* {
    border: none;
    border-radius: 0;
    font-family: Hack, Helvetica, Arial, sans-serif;
    font-size: 13px;
    min-height: 0;
}

window#waybar {
    background-color: #002b36;
    color: #d33682;
    transition-property: background-color;
    transition-duration: .5s;
}

window#waybar.hidden {
    opacity: 0.2;
}

/*
window#waybar.empty {
    background-color: transparent;
}
window#waybar.solo {
    background-color: #FFFFFF;
}
*/

window#waybar.termite {
    background-color: #3F3F3F;
}

window#waybar.chromium {
    background-color: #000000;
    border: none;
}

#workspaces {
    border-bottom: 1px solid #586e75;
}

/* https://github.com/Alexays/Waybar/wiki/FAQ#the-workspace-buttons-have-a-strange-hover-effect */
#workspaces button {
    padding: 0 5px;
    background-color: transparent;
    color: #657b83;
    border-bottom: 3px solid transparent;
}

#workspaces button.focused {
    background-color: #073642;
    border-bottom: 1px solid #ff0;
}

#workspaces button.urgent {
    background-color: #d33682;
}

#mode {
    background-color: #002b36;
    border-bottom: 1px solid #dc322f;
}

#clock, #battery, #cpu, #memory, #temperature, #backlight, #network, #pulseaudio, #custom-media, #tray, #mode, #idle_inhibitor {
    padding: 0 10px;
    margin: 0 2px;
    color: #657b83;
}
/*
#clock {
    background-color: #073642;
}
*/
#battery {
    background-color: #073642;
}

#battery.charging {
    color: #eee8d5;
    background-color: #859900;
}

@keyframes blink {
    to {
        background-color: #d33682;
        color: #93a1a1;
    }
}

#battery.critical:not(.charging) {
    background-color: #dc322f;
    color: #93a1a1;
    animation-name: blink;
    animation-duration: 0.5s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

label:focus {
    background-color: #073642;
}

#cpu {
    background-color: #073642;
}

#memory {
    background-color: #073642;
}

#backlight {
    background-color: #073642;
}

#network {
    background-color: #073642;
}

#network.disconnected {
    background-color: #002b36;
}

#pulseaudio {
    background-color: #073642;
}

#pulseaudio.muted {
    background-color: #002b36;
}

#custom-media {
    background-color: #66cc99;
    color: #2a5c45;
    min-width: 100px;
}

#custom-media.custom-spotify {
    background-color: #66cc99;
}

#custom-media.custom-vlc {
    background-color: #ffa000;
}

#temperature {
    background-color: #073642;
}

#temperature.critical {
    background-color: #dc322f;
}

#tray {
    background-color: #002b36;
}

#idle_inhibitor {
    background-color: #002b36;
}

#idle_inhibitor.activated {
    background-color: #073642;
}