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About this boost
Removes the green and yellow tint from claude.ai's light and dark themes: neutral greys only.
Also colours code blocks with VSCode's default dark syntax theme. The author notes that Claude has since changed how code tokens render, so some colours may be off.
By Alexander Bays (@956MB). Imported from https://github.com/956MB/boosts under the MIT License.
What this boost changes
Custom CSS
Adds 164 lines of its own CSS. Rules that would load files from the internet are rejected when a boost is submitted.
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/* * From https://github.com/956MB/boosts * * MIT License * * Copyright (c) 2026 Alexander Bays * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* Claude Neutral (VSCode Syntax) */ /* https://github.com/956MB/boosts/blob/main/claude-neutral-vscode.css */ /* https://claude.ai/ */ [data-mode="light"] { color-scheme: light !important; --text-000: 0 0% 5.5% !important; --text-100: 0 0% 13.3% !important; --text-200: 0 0% 20% !important; --text-300: 0 0% 30% !important; --text-400: 0 0% 37% !important; --text-500: 0 0% 42.1% !important; --bg-000: 0 0% 97.1% !important; --bg-100: 0 0% 94.9% !important; --bg-200: 0 0% 92% !important; --bg-300: 0 0% 87.8% !important; --bg-400: 0 0% 82% !important; --bg-500: 0 0% 71% !important; } [data-mode="dark"] { color-scheme: dark !important; --text-000: 0 0% 97.1% !important; --text-100: 0 0% 94.9% !important; --text-200: 0 0% 89.2% !important; --text-300: 0 0% 79% !important; --text-400: 0 0% 69.2% !important; --text-500: 0 0% 62.9% !important; --bg-000: 0 0% 22% !important; --bg-100: 0 0% 17.8% !important; --bg-200: 0 0% 16.1% !important; --bg-300: 0 0% 12% !important; --bg-400: 0 0% 9.2% !important; --bg-500: 0 0% 5.5% !important; } .prismjs.code-block__code, code[class*="language-"], .code-block__code[style*="background"], .code-block__code[style], .code-block__code[style] code, .code-block__code code[style], .code-block__code * { background: #252525 !important; background-color: #252525 !important; } [data-theme="claude"] .bg-\[\#282c34\], [data-theme="claude"] .code-block *, [data-theme="claude"] .code-block__code, [data-theme="claude"] .code-block__code > * { background-color: #252525 !important; } span.token[style*="color: rgb(92, 99, 112)"][style*="font-style: italic"]:not( [style*="font-weight:"] ) { color: #666666 !important; } span.token[style*="color: rgb(224, 108, 117)"] { color: #c586c0 !important; } span.token[style*="color: rgb(198, 120, 221)"] { color: #569cd6 !important; } span.token.unit, span.token[style*="color: rgb(152, 195, 121)"], span.token.attribute[style*="color: rgb(152, 195, 121)"] { color: #ce9178 !important; } span.token.class[style*="color: rgb(152, 195, 121)"] { color: #4ec9b0 !important; } span.token[style*="color: rgb(97, 175, 239)"], span.token.pseudo-element[style*="color: rgb(152, 195, 121)"] { color: #dcdcaa !important; } span.token.attribute[style*="color: rgb(209, 154, 102)"] { color: #79c0ff !important; } span.token.attribute[style*="color: rgb(97, 175, 239)"] { color: var(--text-300) !important; } span.token[style*="color: rgb(209, 154, 102)"] { color: #c586c0 !important; } .comment, .quote { color: #666666 !important; } .doctag, .formula, .keyword { color: #569cd6 !important; } .deletion, .name, .section, .selector-tag, .meta, .subst { color: #569cd6 !important; } .literal { color: #56b6c2 !important; } .addition, .attribute, .meta-string, .regexp, .string { color: #ce9178 !important; } .built_in, .class .title { color: #4ec9b0 !important; } .number { color: var(--text-300) !important; } .attr, .selector-attr, .selector-class, .selector-pseudo, .template-variable, .type, .variable { color: #d7ba7d !important; } .bullet, .link, .selector-id, .symbol, .title { color: #dcdcaa !important; }
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