Mint Modern
Open in tool →Emerald as a primary rather than a success color, anchored by deep teal text — fresh, friendly, and fintech-adjacent.
Color
#21504b
#21504b
hex
#21504brgb
rgb(33, 80, 75)hsl
hsl(174, 42%, 22%)oklch
oklch(0.397 0.052 186)Closest name: darkslategray (#2f4f4f)Relative luminance 0.0657
Colors that go with #21504b
Crimson, 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.
Crimson #dc143c
complementaryshippedCrimson sits directly opposite #21504b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Teal #008080
analogousshippedTeal is #21504b'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 Jeep's brand system and Rolex's brand system put Blue beside #21504b, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #21504b: 4 real palettes, including Lamborghini's brand system and Vimeo's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #21504b: 8 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
Emerald Green #50c878
shippedEmerald Green is paired with #21504b in 6 real palettes, including Neon's brand system and Chime's brand system, as the lead colour.
Light Sea Green #20b2aa
shippedLight Sea Green shows up next to #21504b in 4 real palettes, including Lagoon and N26's brand system, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #21504b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #21504b
Tints & shades
Harmonies
Contrast
| #21504b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.08:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.31:1 | 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 #21504b as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#21504b reads as dark, luxury, bold. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #21504b
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #21504b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/21504b-a2bebe-d459a1-1f292d-e9f1ed?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