Palettes / Colors / #665FA4

#665FA4 — Dusty Blue

#665FA4 is a blue color we call Dusty Blue, closest to the named color SlateGray (#708090). It belongs to the blue family.

Color name

Closest CSS keyword: slategray (#708090) — not an exact match. CSS slategray gives you #708090, a different color; use #665FA4 when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#665FA4 is a cool blue color associated with trust, calm and professionalism. It sits comfortably in the middle: usable for large areas in soft schemes, or as a supporting color beside something stronger.

Its strongest partner is its complement #9DA460; it also sits naturally between #607BA4 and #8960A4. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 40% · Green 37% · Blue 64%

Cyan 38% · Magenta 42% · Yellow 0% · Key 36%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #665FA4

.text { color: #665FA4; }
.background { background-color: #665FA4; }
.border { border: 3px solid #665FA4; }
.text-rgb { color: rgb(102, 95, 164); }
.text-hsl { color: hsl(246, 27%, 51%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #665FA4; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 95, 164, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #665FA4; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 95, 164, 0.8); }

HTML: <p style="color:#665FA4">Text here</p> · <div style="background-color:#665FA4">Div content here</div>

Shades of #665FA4

Tints of #665FA4

Tones of #665FA4

Color harmonies

Complementary — #9DA460:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #665FA4: #FFFFFF.

Semi-transparent (opacity) text on #665FA4

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #665FA4 looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #665FA4 rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #665FA3  ·  #665FA5 →

Frequently asked questions

What color is #665FA4?

#665FA4 is Dusty Blue, a blue color (RGB 102, 95, 164). Its closest standard named color is SlateGray.

What is the RGB and HSL of #665FA4?

#665FA4 is RGB 102, 95, 164 — HSL 246°, 27%, 51% — CMYK 38%, 42%, 0%, 36%.

What colors go with #665FA4?

Its complement is #9DA460; analogous partners are #607BA4 and #8960A4. It also appears in 6+ palettes in our collection.

Can I use #665FA4 for text?

White text on #665FA4 has a contrast ratio of 5.62:1 (passes WCAG AA); black text gives 3.74:1.