Color
#21506e
#21506ergb(33, 80, 110)hsl(203, 54%, 28%)oklch(0.413 0.072 239.8)Colors that go with #21506e
Royal Blue, Teal and 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #21506e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #21506e's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped8 real palettes, including Alaska Airlines's brand system and Jeep's brand system put Blue beside #21506e, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #21506e: 4 real palettes, including Dusk and Open House, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #21506e in 10 real palettes, including Codecademy's brand system and Walgreens's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #21506e: 15 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #21506e in 5 real palettes, including Disney's brand system and Fireside, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #21506e: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #21506e
Tints & shades
Harmonies
Contrast
| #21506e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.62:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.44:1 | 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 #21506e 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
#21506e reads as cool, dark, luxury. 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 #21506e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21506e-9cb0c4-df4e5d-1f222d-e9f1f0?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