Color
#121df3
#121df3rgb(18, 29, 243)hsl(237, 90%, 51%)oklch(0.452 0.291 265.5)Colors that go with #121df3
Charcoal, Crimson and Cobalt 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #121df3: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #121df3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #121df3 in 6 real palettes, including CVS's brand system and Procter & Gamble's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #121df3 in 5 real palettes, including Spotify's brand system and Qualcomm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #121df3 in 6 real palettes, including Unity's brand system and Cargo's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #121df3 in 6 real palettes, including Monzo's brand system and Sketch's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #121df3 in 6 real palettes, including Glossier's brand system and Monzo's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Red #ff0000
shippedRed is paired with #121df3 in 4 real palettes, including native Cybersecurity's brand system and Gap's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #121df3
Tints & shades
Harmonies
Contrast
| #121df3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.41:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.5:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #121df3 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#121df3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
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 #121df3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/121df3-9f9cc4-df924e-251f2d-e9edf1?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