Color
#0a42eb
#0a42ebrgb(10, 66, 235)hsl(225, 92%, 48%)oklch(0.484 0.255 264.1)Colors that go with #0a42eb
Charcoal, Crimson and Amber 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 #0a42eb: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #0a42eb — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #0a42eb in 5 real palettes, including Walmart's brand system and Binance's brand system, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #0a42eb: 7 real palettes, including Zillow's brand system and Oreo's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #0a42eb: 8 real palettes, including Qualcomm's brand system and Spotify's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #0a42eb: 8 real palettes, including Coursera's brand system and Unity's brand system, as the supporting colour.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #0a42eb in 6 real palettes, including Indigo SaaS and Unity's brand system, as the accent.
Midnight Blue #191970
shipped10 real palettes, including Penpot's brand system and Purina Pro Plan's brand system put Midnight Blue beside #0a42eb, as the lead colour.
Real palettes that use #0a42eb
Tints & shades
Harmonies
Contrast
| #0a42eb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.02:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.99:1 | 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 #0a42eb as the background.
Brands using this color
Fonts for this mood
#0a42eb 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 #0a42eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0a42eb-9ca1c4-df754e-221f2d-e9eff1?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