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fix(docs): force ER attribute text color via themeCSS in dark mode #132

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pratyush618 merged 1 commit into from
May 3, 2026
+34 −2
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fix(docs): force ER attribute text color via themeCSS in dark mode #132

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36 changes: 34 additions & 2 deletions docs/src/components/mermaid.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import { useTheme } from "next-themes";
import { useEffect, useId, useRef, useState } from "react";

const DARK_THEME_VARIABLES = {
darkMode: true,
background: "transparent",
primaryColor: "#1f2024",
primaryTextColor: "#f5f5f7",
Expand All @@ -25,9 +26,9 @@ const DARK_THEME_VARIABLES = {
noteBorderColor: "#7a7d85",
errorBkgColor: "#4a1d1d",
errorTextColor: "#fca5a5",
// erDiagram-specific (entity attribute rows)
// erDiagram-specific (entity attribute rows) — same color, no zebra stripe
attributeBackgroundColorOdd: "#1f2024",
attributeBackgroundColorEven: "#272a30",
attributeBackgroundColorEven: "#1f2024",
// stateDiagram-specific
altBackground: "#26282d",
// flowchart label colors
Expand All @@ -46,7 +47,37 @@ const DARK_THEME_VARIABLES = {
activationBorderColor: "#9b9ea6",
} as const;

const DARK_THEME_CSS = `
.er.entityBox { fill: #1f2024 !important; stroke: #7a7d85 !important; }
.er.entityLabel { fill: #f5f5f7 !important; }
.er.attributeBoxOdd { fill: #1f2024 !important; }
.er.attributeBoxEven { fill: #1f2024 !important; }
.er .er.attribute-text,
.er .attribute-text,
.er text {
fill: #f5f5f7 !important;
}
.er.relationshipLabel,
.er.relationshipLabelBox {
fill: #f5f5f7 !important;
}
.er.relationshipLabelBox + text { fill: #1a1a1a !important; }
`;

const LIGHT_THEME_CSS = `
.er.entityBox { fill: #ffffff !important; stroke: #3a3a3a !important; }
.er.entityLabel { fill: #1a1a1a !important; }
.er.attributeBoxOdd { fill: #ffffff !important; }
.er.attributeBoxEven { fill: #f4f4f5 !important; }
.er .er.attribute-text,
.er .attribute-text,
.er text {
fill: #1a1a1a !important;
}
`;

const LIGHT_THEME_VARIABLES = {
darkMode: false,
background: "transparent",
primaryColor: "#ffffff",
primaryTextColor: "#1a1a1a",
Expand Down Expand Up @@ -105,6 +136,7 @@ export function Mermaid({ chart }: { chart: string }) {
startOnLoad: false,
theme: "base",
themeVariables: isDark ? DARK_THEME_VARIABLES : LIGHT_THEME_VARIABLES,
themeCSS: isDark ? DARK_THEME_CSS : LIGHT_THEME_CSS,
securityLevel: "loose",
fontFamily: '"IBM Plex Sans", "Inter", system-ui, sans-serif',
flowchart: { padding: 18, htmlLabels: true, useMaxWidth: true },
Expand Down
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