Palettes / Colors / #665BCD

#665BCD — Muted Blue

#665BCD is a blue color we call Muted Blue, closest to the named color SlateBlue (#6A5ACD). It belongs to the blue family.

Color name

Closest CSS keyword: slateblue (#6A5ACD) — not an exact match. CSS slateblue gives you #6A5ACD, a different color; use #665BCD 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.

#665BCD 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 #C1CD5B; it also sits naturally between #5B89CD and #9F5BCD. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 40% · Green 36% · Blue 80%

Cyan 50% · Magenta 56% · Yellow 0% · Key 20%

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

Previews

CSS code for #665BCD

.text { color: #665BCD; }
.background { background-color: #665BCD; }
.border { border: 3px solid #665BCD; }
.text-rgb { color: rgb(102, 91, 205); }
.text-hsl { color: hsl(246, 53%, 58%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #665BCD; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 91, 205, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #665BCD; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 91, 205, 0.8); }

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

Shades of #665BCD

Tints of #665BCD

Tones of #665BCD

Color harmonies

Complementary — #C1CD5B:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #665BCD: #FFFFFF.

Semi-transparent (opacity) text on #665BCD

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 #665BCD 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 #665BCD 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

← #665BCC  ·  #665BCE →

Frequently asked questions

What color is #665BCD?

#665BCD is Muted Blue, a blue color (RGB 102, 91, 205). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #665BCD?

#665BCD is RGB 102, 91, 205 — HSL 246°, 53%, 58% — CMYK 50%, 56%, 0%, 20%.

What colors go with #665BCD?

Its complement is #C1CD5B; analogous partners are #5B89CD and #9F5BCD. It also appears in 6+ palettes in our collection.

Can I use #665BCD for text?

White text on #665BCD has a contrast ratio of 5.33:1 (passes WCAG AA); black text gives 3.94:1.