アクセントカラーを選ぶと，for Educationのカラーリングを変更することができます。
また，完全なコピーをすると ダークモードにも対応します。
既存のCSSは削除する必要はありません。
カラー(21)
body {--primary:#bb1614;--on-primary:#ffffff;--primary-container:#ffdad5;--on-primary-container:#410001;--secondary:#775652;--on-secondary:#ffffff;--secondary-container:#ffdad5;--on-secondary-container:#2c1512;--tertiary:#705c2e;--on-tertiary:#ffffff;--tertiary-container:#fcdfa6;--on-tertiary-container:#261a00;--error:#ba1a1a;--on-error:#ffffff;--error-container:#ffdad6;--on-error-container:#410002;--background:#fffbff;--on-background:#201a19;--surface:#fff8f7;--on-surface:#201a19;--surface-variant:#f5ddda;--on-surface-variant:#534341;--outline:#857370;--outline-variant:#d8c2be;--shadow:#000000;--scrim:#000000;--inverse-surface:#362f2e;--inverse-on-surface:#fbeeec;--inverse-primary:#ffb4a9;--surface-dim:#e4d7d5;--surface-bright:#fff8f7;--surface-container-lowest:#ffffff;--surface-container-low:#fef1ef;--surface-container:#f8ebe9;--surface-container-high:#f3e5e3;--surface-container-highest:#ede0de;}@media (prefers-color-scheme: dark) {body {--primary:#ffb4a9;--on-primary:#690002;--primary-container:#930005;--on-primary-container:#ffdad5;--secondary:#e7bdb7;--on-secondary:#442926;--secondary-container:#5d3f3b;--on-secondary-container:#ffdad5;--tertiary:#dfc38c;--on-tertiary:#3e2e04;--tertiary-container:#574419;--on-tertiary-container:#fcdfa6;--error:#ffb4ab;--on-error:#690005;--error-container:#93000a;--on-error-container:#ffb4ab;--background:#201a19;--on-background:#ede0de;--surface:#181211;--on-surface:#ede0de;--surface-variant:#534341;--on-surface-variant:#d8c2be;--outline:#a08c89;--outline-variant:#534341;--shadow:#000000;--scrim:#000000;--inverse-surface:#ede0de;--inverse-on-surface:#362f2e;--inverse-primary:#bb1614;--surface-dim:#181211;--surface-bright:#3f3736;--surface-container-lowest:#120d0c;--surface-container-low:#201a19;--surface-container:#251e1d;--surface-container-high:#2f2827;--surface-container-highest:#3b3332;}}
body {--primary:#bc004b;--on-primary:#ffffff;--primary-container:#ffd9de;--on-primary-container:#400014;--secondary:#75565b;--on-secondary:#ffffff;--secondary-container:#ffd9de;--on-secondary-container:#2c1519;--tertiary:#795831;--on-tertiary:#ffffff;--tertiary-container:#ffddba;--on-tertiary-container:#2b1700;--error:#ba1a1a;--on-error:#ffffff;--error-container:#ffdad6;--on-error-container:#410002;--background:#fffbff;--on-background:#201a1b;--surface:#fff8f7;--on-surface:#201a1b;--surface-variant:#f3dddf;--on-surface-variant:#524345;--outline:#847375;--outline-variant:#d6c2c3;--shadow:#000000;--scrim:#000000;--inverse-surface:#362f2f;--inverse-on-surface:#fbeeee;--inverse-primary:#ffb2be;--surface-dim:#e3d7d8;--surface-bright:#fff8f7;--surface-container-lowest:#ffffff;--surface-container-low:#fdf1f1;--surface-container:#f8ebeb;--surface-container-high:#f2e5e6;--surface-container-highest:#ece0e0;}@media (prefers-color-scheme: dark) {body {--primary:#ffb2be;--on-primary:#660025;--primary-container:#900038;--on-primary-container:#ffd9de;--secondary:#e5bdc2;--on-secondary:#43292d;--secondary-container:#5c3f43;--on-secondary-container:#ffd9de;--tertiary:#ebbf90;--on-tertiary:#452b08;--tertiary-container:#5f411c;--on-tertiary-container:#ffddba;--error:#ffb4ab;--on-error:#690005;--error-container:#93000a;--on-error-container:#ffb4ab;--background:#201a1b;--on-background:#ece0e0;--surface:#181213;--on-surface:#ece0e0;--surface-variant:#524345;--on-surface-variant:#d6c2c3;--outline:#9f8c8e;--outline-variant:#524345;--shadow:#000000;--scrim:#000000;--inverse-surface:#ece0e0;--inverse-on-surface:#362f2f;--inverse-primary:#bc004b;--surface-dim:#181213;--surface-bright:#3f3738;--surface-container-lowest:#120d0d;--surface-container-low:#201a1b;--surface-container:#241e1f;--surface-container-high:#2f2829;--surface-container-highest:#3a3334;}}
body {--primary:#9a25ae;--on-primary:#ffffff;--primary-container:#ffd6fe;--on-primary-container:#35003f;--secondary:#6b586b;--on-secondary:#ffffff;--secondary-container:#f4dbf1;--on-secondary-container:#251626;--tertiary:#82524a;--on-tertiary:#ffffff;--tertiary-container:#ffdad4;--on-tertiary-container:#33110c;--error:#ba1a1a;--on-error:#ffffff;--error-container:#ffdad6;--on-error-container:#410002;--background:#fffbff;--on-background:#1e1a1d;--surface:#fff7fa;--on-surface:#1e1a1d;--surface-variant:#ecdfe8;--on-surface-variant:#4d444c;--outline:#7f747d;--outline-variant:#d0c3cc;--shadow:#000000;--scrim:#000000;--inverse-surface:#332f32;--inverse-on-surface:#f7eef3;--inverse-primary:#f9abff;--surface-dim:#e0d8dc;--surface-bright:#fff7fa;--surface-container-lowest:#ffffff;--surface-container-low:#faf1f5;--surface-container:#f4ecf0;--surface-container-high:#eee6ea;--surface-container-highest:#e9e0e4;}@media (prefers-color-scheme: dark) {body {--primary:#f9abff;--on-primary:#570066;--primary-container:#7b008f;--on-primary-container:#ffd6fe;--secondary:#d7bfd5;--on-secondary:#3b2b3c;--secondary-container:#534153;--on-secondary-container:#f4dbf1;--tertiary:#f6b8ad;--on-tertiary:#4c251f;--tertiary-container:#673b34;--on-tertiary-container:#ffdad4;--error:#ffb4ab;--on-error:#690005;--error-container:#93000a;--on-error-container:#ffb4ab;--background:#1e1a1d;--on-background:#e9e0e4;--surface:#161215;--on-surface:#e9e0e4;--surface-variant:#4d444c;--on-surface-variant:#d0c3cc;--outline:#998d96;--outline-variant:#4d444c;--shadow:#000000;--scrim:#000000;--inverse-surface:#e9e0e4;--inverse-on-surface:#332f32;--inverse-primary:#9a25ae;--surface-dim:#161215;--surface-bright:#3c383b;--surface-container-lowest:#100d10;--surface-container-low:#1e1a1d;--surface-container:#221e22;--surface-container-high:#2d292c;--surface-container-highest:#383337;}}
body {--primary:#6f43c0;--on-primary:#ffffff;--primary-container:#ebddff;--on-primary-container:#250059;--secondary:#635b70;--on-secondary:#ffffff;--secondary-container:#e9def8;--on-secondary-container:#1f182b;--tertiary:#7e525d;--on-tertiary:#ffffff;--tertiary-container:#ffd9e1;--on-tertiary-container:#31101b;--error:#ba1a1a;--on-error:#ffffff;--error-container:#ffdad6;--on-error-container:#410002;--background:#fffbff;--on-background:#1d1b1e;--surface:#fef8fd;--on-surface:#1d1b1e;--surface-variant:#e7e0eb;--on-surface-variant:#49454e;--outline:#7a757f;--outline-variant:#cbc4cf;--shadow:#000000;--scrim:#000000;--inverse-surface:#323033;--inverse-on-surface:#f5eff4;--inverse-primary:#d3bbff;--surface-dim:#ded8dd;--surface-bright:#fef8fd;--surface-container-lowest:#ffffff;--surface-container-low:#f8f2f7;--surface-container:#f2ecf1;--surface-container-high:#ece6eb;--surface-container-highest:#e6e1e6;}@media (prefers-color-scheme: dark) {body {--primary:#d3bbff;--on-primary:#3f008d;--primary-container:#5727a6;--on-primary-container:#ebddff;--secondary:#cdc2db;--on-secondary:#342d40;--secondary-container:#4b4358;--on-secondary-container:#e9def8;--tertiary:#f0b7c5;--on-tertiary:#4a2530;--tertiary-container:#643b46;--on-tertiary-container:#ffd9e1;--error:#ffb4ab;--on-error:#690005;--error-container:#93000a;--on-error-container:#ffb4ab;--background:#1d1b1e;--on-background:#e6e1e6;--surface:#141316;--on-surface:#e6e1e6;--surface-variant:#49454e;--on-surface-variant:#cbc4cf;--outline:#948f99;--outline-variant:#49454e;--shadow:#000000;--scrim:#000000;--inverse-surface:#e6e1e6;--inverse-on-surface:#323033;--inverse-primary:#6f43c0;--surface-dim:#141316;--surface-bright:#3b383c;--surface-container-lowest:#0f0e11;--surface-container-low:#1d1b1e;--surface-container:#211f22;--surface-container-high:#2b292d;--surface-container-highest:#363438;}}
body {--primary:#0061a4;--on-primary:#ffffff;--primary-container:#d1e4ff;--on-primary-container:#001d36;--secondary:#535f70;--on-secondary:#ffffff;--secondary-container:#d7e3f7;--on-secondary-container:#101c2b;--tertiary:#6b5778;--on-tertiary:#ffffff;--tertiary-container:#f2daff;--on-tertiary-container:#251431;--error:#ba1a1a;--on-error:#ffffff;--error-container:#ffdad6;--on-error-container:#410002;--background:#fdfcff;--on-background:#1a1c1e;--surface:#faf9fc;--on-surface:#1a1c1e;--surface-variant:#dfe2eb;--on-surface-variant:#43474e;--outline:#73777f;--outline-variant:#c3c7cf;--shadow:#000000;--scrim:#000000;--inverse-surface:#2f3033;--inverse-on-surface:#f1f0f4;--inverse-primary:#9ecaff;--surface-dim:#dadadd;--surface-bright:#faf9fc;--surface-container-lowest:#ffffff;--surface-container-low:#f4f3f7;--surface-container:#eeedf1;--surface-container-high:#e8e8eb;--surface-container-highest:#e2e2e6;}@media (prefers-color-scheme: dark) {body {--primary:#9ecaff;--on-primary:#003258;--primary-container:#00497d;--on-primary-container:#d1e4ff;--secondary:#bbc7db;--on-secondary:#253140;--secondary-container:#3b4858;--on-secondary-container:#d7e3f7;--tertiary:#d6bee4;--on-tertiary:#3b2948;--tertiary-container:#523f5f;--on-tertiary-container:#f2daff;--error:#ffb4ab;--on-error:#690005;--error-container:#93000a;--on-error-container:#ffb4ab;--background:#1a1c1e;--on-background:#e2e2e6;--surface:#121316;--on-surface:#e2e2e6;--surface-variant:#43474e;--on-surface-variant:#c3c7cf;--outline:#8d9199;--outline-variant:#43474e;--shadow:#000000;--scrim:#000000;--inverse-surface:#e2e2e6;--inverse-on-surface:#2f3033;--inverse-primary:#0061a4;--surface-dim:#121316;--surface-bright:#38393c;--surface-container-lowest:#0d0e11;--surface-container-low:#1a1c1e;--surface-container:#1e2022;--surface-container-high:#282a2d;--surface-container-highest:#333538;}}