Palettes / Colors / #665DA3

#665DA3 — Dusty Blue

#665DA3 is a blue color we call Dusty Blue, closest to the named color SlateGray (#708090). It belongs to the blue family.

#665DA3 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 #9AA35C; it also sits naturally between #5C76A3 and #895CA3. 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 36% · Blue 64%

Cyan 37% · Magenta 43% · Yellow 0% · Key 36%

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

Previews

CSS code for #665DA3

.text { color: #665DA3; }
.background { background-color: #665DA3; }
.border { border: 3px solid #665DA3; }
.text-rgb { color: rgb(102, 93, 163); }
.text-hsl { color: hsl(248, 28%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #665DA3; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 93, 163, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #665DA3; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 93, 163, 0.8); }

HTML: <p style="color:#665DA3">Text here</p> · <div style="background-color:#665DA3">Div content here</div>

Shades of #665DA3

Tints of #665DA3

Tones of #665DA3

Color harmonies

Complementary — #9AA35C:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #665DA3: #FFFFFF.

How #665DA3 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 #665DA3 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

← #665DA2  ·  #665DA4 →

Frequently asked questions

What color is #665DA3?

#665DA3 is Dusty Blue, a blue color (RGB 102, 93, 163). Its closest standard named color is SlateGray.

What is the RGB and HSL of #665DA3?

#665DA3 is RGB 102, 93, 163 — HSL 248°, 28%, 50% — CMYK 37%, 43%, 0%, 36%.

What colors go with #665DA3?

Its complement is #9AA35C; analogous partners are #5C76A3 and #895CA3. It also appears in 6+ palettes in our collection.

Can I use #665DA3 for text?

White text on #665DA3 has a contrast ratio of 5.74:1 (passes WCAG AA); black text gives 3.66:1.