Color
#121fd9
#121fd9rgb(18, 31, 217)hsl(236, 85%, 46%)oklch(0.421 0.263 265.9)Colors that go with #121fd9
Charcoal, Crimson 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #121fd9: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #121fd9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #121fd9: 5 real palettes, including Canva's brand system and Spotify's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #121fd9: 5 real palettes, including Activision's brand system and Unilever's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #121fd9: 6 real palettes, including Cargo's brand system and Readymag's brand system, as the lead colour.
Midnight Blue #191970
shipped10 real palettes, including Monzo's brand system and Sketch's brand system put Midnight Blue beside #121fd9, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #121fd9 in 8 real palettes, including Doordash's brand system and Monzo's brand system, as the lead colour.
Red #ff0000
shippedRed is paired with #121fd9 in 7 real palettes, including 3M's brand system and Doordash's brand system, as the lead colour.
Real palettes that use #121fd9
Tints & shades
Harmonies
Contrast
| #121fd9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.44:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.22:1 | 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 #121fd9 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
#121fd9 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 #121fd9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/121fd9-9e9cc4-df8f4e-241f2d-e9eef1?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