Minor color tweaks (go-gitea#30397)

New approach to color shades: Stem all colors off the body color
`#1b1f23` using [this](https://pinetools.com/darken-color) and
[this](https://pinetools.com/lighten-color) tool. The differences are
very subtle, but it will give a more consistent color scheme until
go-gitea#30160.

<img width="1342" alt="Screenshot 2024-04-10 at 20 44 16"
src="https://github.com/go-gitea/gitea/assets/115237/75b65797-2521-46ea-91d8-d76f77b591b1">

Author: silverwind

web_src/css/themes/theme-gitea-dark.css

@@ -30,45 +30,45 @@
   --color-primary-alpha-90: #4183c4e1;
   --color-primary-hover: var(--color-primary-light-1);
   --color-primary-active: var(--color-primary-light-2);
-  --color-secondary: #3b444a;
-  --color-secondary-dark-1: #424b51;
-  --color-secondary-dark-2: #4a545b;
-  --color-secondary-dark-3: #59646c;
-  --color-secondary-dark-4: #6b7681;
-  --color-secondary-dark-5: #78858f;
-  --color-secondary-dark-6: #87929d;
-  --color-secondary-dark-7: #939ea9;
-  --color-secondary-dark-8: #a1acb4;
-  --color-secondary-dark-9: #aab3bc;
-  --color-secondary-dark-10: #b6bfc8;
-  --color-secondary-dark-11: #c2cbd3;
-  --color-secondary-dark-12: #ccd4dc;
-  --color-secondary-dark-13: #cfd7df;
-  --color-secondary-light-1: #2e353b;
-  --color-secondary-light-2: #2b353e;
-  --color-secondary-light-3: #1c2227;
-  --color-secondary-light-4: #161b1f;
-  --color-secondary-alpha-10: #3b444a19;
-  --color-secondary-alpha-20: #3b444a33;
-  --color-secondary-alpha-30: #3b444a4b;
-  --color-secondary-alpha-40: #3b444a66;
-  --color-secondary-alpha-50: #3b444a80;
-  --color-secondary-alpha-60: #3b444a99;
-  --color-secondary-alpha-70: #3b444ab3;
-  --color-secondary-alpha-80: #3b444acc;
-  --color-secondary-alpha-90: #3b444ae1;
+  --color-secondary: #3b444c;
+  --color-secondary-dark-1: #414b54;
+  --color-secondary-dark-2: #49545f;
+  --color-secondary-dark-3: #576471;
+  --color-secondary-dark-4: #677685;
+  --color-secondary-dark-5: #758594;
+  --color-secondary-dark-6: #8392a0;
+  --color-secondary-dark-7: #929eab;
+  --color-secondary-dark-8: #a2acb7;
+  --color-secondary-dark-9: #a9b3bd;
+  --color-secondary-dark-10: #b7bfc7;
+  --color-secondary-dark-11: #c5cbd2;
+  --color-secondary-dark-12: #cfd4da;
+  --color-secondary-dark-13: #d2d7dc;
+  --color-secondary-light-1: #313940;
+  --color-secondary-light-2: #292f35;
+  --color-secondary-light-3: #1d2226;
+  --color-secondary-light-4: #171b1e;
+  --color-secondary-alpha-10: #3b444c19;
+  --color-secondary-alpha-20: #3b444c33;
+  --color-secondary-alpha-30: #3b444c4b;
+  --color-secondary-alpha-40: #3b444c66;
+  --color-secondary-alpha-50: #3b444c80;
+  --color-secondary-alpha-60: #3b444c99;
+  --color-secondary-alpha-70: #3b444cb3;
+  --color-secondary-alpha-80: #3b444ccc;
+  --color-secondary-alpha-90: #3b444ce1;
   --color-secondary-button: var(--color-secondary-dark-4);
   --color-secondary-hover: var(--color-secondary-dark-3);
   --color-secondary-active: var(--color-secondary-dark-2);
   /* console colors - used for actions console and console files */
-  --color-console-fg: #f8f8f9;
-  --color-console-fg-subtle: #bec4c8;
+  --color-console-fg: #f7f8f9;
+  --color-console-fg-subtle: #bdc4cc;
   --color-console-bg: #171b1e;
   --color-console-border: #2e353b;
-  --color-console-hover-bg: #292d31;
+  --color-console-hover-bg: #272d33;
   --color-console-active-bg: #2e353b;
-  --color-console-menu-bg: #252b30;
-  --color-console-menu-border: #424b51;
+  --color-console-menu-bg: #262b31;
+  --color-console-menu-border: #414b55;
   /* named colors */
   --color-red: #cc4848;
   --color-orange: #cc580c;
@@ -122,7 +122,7 @@
   --color-brown-dark-2: #835b42;
   --color-black-dark-2: #272930;
   /* ansi colors used for actions console and console files */
-  --color-ansi-black: #1d2328;
+  --color-ansi-black: #1e2327;
   --color-ansi-red: #cc4848;
   --color-ansi-green: #87ab63;
   --color-ansi-yellow: #cc9903;
@@ -139,8 +139,8 @@
   --color-ansi-bright-cyan: #00b6ad;
   --color-ansi-bright-white: var(--color-console-fg);
   /* other colors */
-  --color-grey: #384147;
-  --color-grey-light: #828f99;
+  --color-grey: #384149;
+  --color-grey-light: #818f9e;
   --color-gold: #b1983b;
   --color-white: #ffffff;
   --color-diff-removed-word-bg: #6f3333;
@@ -180,55 +180,55 @@
   --color-orange-badge-hover-bg: #f2711c4d;
   --color-git: #f05133;
   /* target-based colors */
-  --color-body: #1c1f25;
+  --color-body: #1b1f23;
   --color-box-header: #1a1d1f;
   --color-box-body: #14171a;
-  --color-box-body-highlight: #1c2227;
-  --color-text-dark: #f8f8f9;
-  --color-text: #d1d5d8;
-  --color-text-light: #bdc3c7;
-  --color-text-light-1: #a8afb5;
-  --color-text-light-2: #929ba2;
-  --color-text-light-3: #7c8790;
+  --color-box-body-highlight: #1e2226;
+  --color-text-dark: #f7f8f9;
+  --color-text: #d0d5da;
+  --color-text-light: #bcc3cb;
+  --color-text-light-1: #a5afb9;
+  --color-text-light-2: #8f9ba8;
+  --color-text-light-3: #788797;
   --color-footer: var(--color-nav-bg);
-  --color-timeline: #353c42;
+  --color-timeline: #343c44;
   --color-input-text: var(--color-text-dark);
-  --color-input-background: #151a1e;
-  --color-input-toggle-background: #2e353b;
+  --color-input-background: #171a1e;
+  --color-input-toggle-background: #2e353c;
   --color-input-border: var(--color-secondary);
   --color-input-border-hover: var(--color-secondary-dark-1);
   --color-light: #00001728;
   --color-light-mimic-enabled: rgba(0, 0, 0, calc(40 / 255 * 222 / 255 / var(--opacity-disabled)));
-  --color-light-border: #e8e8ff28;
-  --color-hover: #e8e8ff19;
-  --color-active: #e8e8ff24;
-  --color-menu: #151a1e;
-  --color-card: #151a1e;
-  --color-markup-table-row: #e8e8ff0f;
-  --color-markup-code-block: #e8e8ff12;
-  --color-markup-code-inline: #e8e8ff28;
-  --color-button: #151a1e;
+  --color-light-border: #e8f3ff28;
+  --color-hover: #e8f3ff19;
+  --color-active: #e8f3ff24;
+  --color-menu: #171a1e;
+  --color-card: #171a1e;
+  --color-markup-table-row: #e8f3ff0f;
+  --color-markup-code-block: #e8f3ff12;
+  --color-markup-code-inline: #e8f3ff28;
+  --color-button: #171a1e;
   --color-code-bg: #14171a;
   --color-shadow: #00001758;
-  --color-secondary-bg: #2f3138;
-  --color-expand-button: #2b353e;
+  --color-secondary-bg: #2a3137;
+  --color-expand-button: #2f363d;
   --color-placeholder-text: var(--color-text-light-3);
   --color-editor-line-highlight: var(--color-primary-light-5);
   --color-project-board-bg: var(--color-secondary-light-2);
   --color-caret: var(--color-text); /* should ideally be --color-text-dark, see #15651 */
-  --color-reaction-bg: #e8e8ff12;
+  --color-reaction-bg: #e8f3ff12;
   --color-reaction-hover-bg: var(--color-primary-light-4);
   --color-reaction-active-bg: var(--color-primary-light-5);
-  --color-tooltip-text: #fafafb;
-  --color-tooltip-bg: #000017f0;
-  --color-nav-bg: #16191c;
+  --color-tooltip-text: #f9fafb;
+  --color-tooltip-bg: #000b17f0;
+  --color-nav-bg: #16191d;
   --color-nav-hover-bg: var(--color-secondary-light-1);
   --color-nav-text: var(--color-text);
   --color-secondary-nav-bg: #181c20;
   --color-label-text: var(--color-text);
-  --color-label-bg: #73828e4b;
-  --color-label-hover-bg: #73828ea0;
-  --color-label-active-bg: #73828eff;
+  --color-label-bg: #7282924b;
+  --color-label-hover-bg: #728292a0;
+  --color-label-active-bg: #728292ff;
   --color-accent: var(--color-primary-light-1);
   --color-small-accent: var(--color-primary-light-5);
   --color-highlight-fg: #87651e;

web_src/css/themes/theme-gitea-light.css

@@ -61,14 +61,14 @@
   --color-secondary-hover: var(--color-secondary-dark-5);
   --color-secondary-active: var(--color-secondary-dark-6);
   /* console colors - used for actions console and console files */
-  --color-console-fg: #f8f8f9;
-  --color-console-fg-subtle: #bec4c8;
+  --color-console-fg: #f7f8f9;
+  --color-console-fg-subtle: #bdc4cc;
   --color-console-bg: #171b1e;
   --color-console-border: #2e353b;
-  --color-console-hover-bg: #292d31;
+  --color-console-hover-bg: #272d33;
   --color-console-active-bg: #2e353b;
-  --color-console-menu-bg: #252b30;
-  --color-console-menu-border: #424b51;
+  --color-console-menu-bg: #262b31;
+  --color-console-menu-border: #414b55;
   /* named colors */
   --color-red: #db2828;
   --color-orange: #f2711c;
@@ -81,7 +81,7 @@
   --color-purple: #a333c8;
   --color-pink: #e03997;
   --color-brown: #a5673f;
-  --color-black: #191c1d;
+  --color-black: #1d2328;
   /* light variants - produced via Sass scale-color(color, $lightness: +25%) */
   --color-red-light: #e45e5e;
   --color-orange-light: #f59555;
@@ -94,7 +94,7 @@
   --color-purple-light: #bb64d8;
   --color-pink-light: #e86bb1;
   --color-brown-light: #c58b66;
-  --color-black-light: #525558;
+  --color-black-light: #4b5b68;
   /* dark 1 variants - produced via Sass scale-color(color, $lightness: -10%) */
   --color-red-dark-1: #c82121;
   --color-orange-dark-1: #e6630d;
@@ -107,7 +107,7 @@
   --color-purple-dark-1: #932eb4;
   --color-pink-dark-1: #db228a;
   --color-brown-dark-1: #955d39;
-  --color-black-dark-1: #16191c;
+  --color-black-dark-1: #2c3339;
   /* dark 2 variants - produced via Sass scale-color(color, $lightness: -20%) */
   --color-red-dark-2: #b11e1e;
   --color-orange-dark-2: #cc580c;
@@ -122,7 +122,7 @@
   --color-brown-dark-2: #845232;
   --color-black-dark-2: #131619;
   /* ansi colors used for actions console and console files */
-  --color-ansi-black: #1f2326;
+  --color-ansi-black: #1e2327;
   --color-ansi-red: #cc4848;
   --color-ansi-green: #87ab63;
   --color-ansi-yellow: #cc9903;