Color
#b3d421
#b3d421rgb(179, 212, 33)hsl(71, 73%, 48%)oklch(0.817 0.188 120.6)Colors that go with #b3d421
Deep Sky Blue, Blue and Cornflower Blue 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 #b3d421 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blue #0000ff
shipped4 real palettes, including Binance's brand system and MongoDB's brand system put Blue beside #b3d421, as the accent.
Cornflower Blue #6495ed
split-complementshippedCornflower Blue is a split-complement of #b3d421: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #b3d421 in 5 real palettes, including Wise's brand system and Tabloid, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #b3d421: 6 real palettes, including Wikipedia's brand system and Ikea's brand system, as the supporting colour.
Red #ff0000
shippedRed is paired with #b3d421 in 5 real palettes, including Wise's brand system and Gatorade's brand system, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #b3d421 in 5 real palettes, including Monster Energy's brand system and NBA's brand system, as the lead colour.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #b3d421: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Real palettes that use #b3d421
Tints & shades
Harmonies
Contrast
| #b3d421 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.7:1 | fail | fail | fail | |
Aaon black | 12.36:1 | 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 #b3d421 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 #b3d421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/b3d421-b6bea2-4e7adf-252d1f-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