Named color
Becquerel
#4bec13rgb(75, 236, 19)hsl(105, 85%, 50%)oklch(0.826 0.263 140.3)Becquerel on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the curated palettes it appears in and any public brand that adopts it.
Colors that go with Becquerel
Deep Sky Blue, Violet and Hot Pink lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Deep Sky Blue #00bfff
triadicshippedDeep Sky Blue completes a triad with Becquerel — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Violet #ee82ee
complementaryViolet sits directly opposite Becquerel on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Hot Pink #ff69b4
split-complementHot Pink is a split-complement of Becquerel: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralCharcoal is the body-text near-black for Becquerel: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Lilac #c8a2c8
split-complementLilac is a split-complement of Becquerel: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Red #ff0000
shippedRed is paired with Becquerel in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with Becquerel in two real palettes: MongoDB's brand system and Brilliant's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with Becquerel in two real palettes: 7-Eleven's brand system and WhatsApp's brand system, as the lead colour.
Real palettes that use Becquerel
Tints & shades
Harmonies
Contrast
| Becquerel as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.58:1 | fail | fail | fail | |
Aaon black | 13.31:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with Becquerel as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #4bec13 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4bec13-a6bea2-754edf-1f2d22-eff1e9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md