Color
#b9e421
#b9e421rgb(185, 228, 33)hsl(73, 78%, 51%)oklch(0.858 0.203 122.6)Colors that go with #b9e421
Blue, Crimson and Denim 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.
Blue #0000ff
shipped5 real palettes, including Robinhood's brand system and Binance's brand system put Blue beside #b9e421, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #b9e421 in 8 real palettes, including Wise's brand system and Lay's's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #b9e421: 5 real palettes, including Ikea's brand system and LEGO's brand system, as the accent.
Red #ff0000
shippedRed is paired with #b9e421 in 6 real palettes, including Wise's brand system and Gatorade's brand system, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #b9e421 in 8 real palettes, including Citrus Grove and Crayon Box, as the text colour against it.
Plum #dda0dd
complementaryPlum sits directly opposite #b9e421 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Violet #ee82ee
split-complementshippedViolet is a split-complement of #b9e421: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #b9e421: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Real palettes that use #b9e421
Tints & shades
Harmonies
Contrast
| #b9e421 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.48:1 | fail | fail | fail | |
Aaon black | 14.18:1 | 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 #b9e421 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 #b9e421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/b9e421-b5bea2-4e75df-242d1f-f1efe9?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