Color
#5151b3
#5151b3rgb(81, 81, 179)hsl(240, 39%, 51%)oklch(0.489 0.152 279.2)Colors that go with #5151b3
Charcoal, Amber 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #5151b3: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #5151b3 in 7 real palettes, including Warner Bros.'s brand system and Wikipedia's brand system, as the accent.
Blue #0000ff
shipped8 real palettes, including Pixar's brand system and Tesco's brand system put Blue beside #5151b3, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #5151b3: 6 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #5151b3 in 16 real palettes, including Wells Fargo's brand system and Netflix's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #5151b3: 5 real palettes, including Kraken's brand system and Calm's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #5151b3: 6 real palettes, including HashiCorp's brand system and Coursera's brand system, as the supporting colour.
Steel Blue #4682b4
analogousshippedSteel Blue is #5151b3's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Real palettes that use #5151b3
Tints & shades
Harmonies
Contrast
| #5151b3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.61:1 | pass | pass | fail |
|
Aaon black | 3.18:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5151b3 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
#5151b3 reads as cool, modern. 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 #5151b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5151b3-a19cc4-df994e-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