/**
 * Design Studio color utilities.
 *
 * Design kit tokens are authored in OKLCH (CSS-native, the modern 2026 default).
 * CSS targets keep them verbatim, but native stacks (React Native, Flutter,
 * SwiftUI, Compose) need concrete sRGB — so `materialize` converts each token
 * with `oklchToHex`. The verifier also normalizes colors to hex before
 * comparing, so an `oklch()` token and the same color written as `#rrggbb`
 * count as a match.
 *
 * Conversion is the standard Björn Ottosson OKLab→linear-sRGB pipeline; values
 * out of the sRGB gamut are clamped (not gamut-mapped) — adequate for the
 * near-in-gamut palettes our kits use.
 */
/** Parse an `oklch(L C H[ / a])` string into [L(0..1), C, H(deg), a(0..1)] or null. */
export declare function parseOklch(value: string): [number, number, number, number] | null;
/**
 * Convert an OKLCH string to `#rrggbb` (or `#rrggbbaa` when alpha < 1).
 * Returns null if `value` is not parseable OKLCH.
 */
export declare function oklchToHex(value: string): string | null;
/**
 * Normalize any color token to a lowercase `#rrggbb[aa]` hex when possible.
 * Passes through existing hex (lowercased, expanded from #rgb), converts
 * `oklch(...)`, and returns null for values we can't resolve (named colors,
 * gradients, non-color tokens like font names).
 */
export declare function colorToHex(value: string): string | null;
/** True when a token value looks like a color (OKLCH or hex), not a font/size. */
export declare function isColorToken(value: string): boolean;
/**
 * Classify a design-token string into the axis it drives, so materialize/verify
 * can branch beyond colors. Order matters: colors first (an `oklch()` is not a
 * gradient), then single-unit forms, then multi-part shadow, then font stacks.
 *
 * A font-family is inferred structurally (a comma-separated list, or a single
 * quoted/multi-word/known-generic name) rather than by a token-name allowlist,
 * so custom fonts classify correctly.
 */
export declare function classifyTokenValue(value: string): import('../types/design-kit.js').TokenValueKind;
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