Palettes / Colors / #646397

#646397 — Dusty Blue

#646397 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 #646397 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.

#646397 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 #969763; it also sits naturally between #637C97 and #7E6397. 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 39% · Green 39% · Blue 59%

Cyan 34% · Magenta 34% · Yellow 0% · Key 41%

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

Previews

CSS code for #646397

.text { color: #646397; }
.background { background-color: #646397; }
.border { border: 3px solid #646397; }
.text-rgb { color: rgb(100, 99, 151); }
.text-hsl { color: hsl(241, 21%, 49%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #646397; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(100, 99, 151, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #646397; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(100, 99, 151, 0.8); }

HTML: <p style="color:#646397">Text here</p> · <div style="background-color:#646397">Div content here</div>

Shades of #646397

Tints of #646397

Tones of #646397

Color harmonies

Complementary — #969763:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #646397: #FFFFFF.

Semi-transparent (opacity) text on #646397

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 #646397 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 #646397 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

← #646396  ·  #646398 →

Frequently asked questions

What color is #646397?

#646397 is Dusty Blue, a blue color (RGB 100, 99, 151). Its closest standard named color is SlateGray.

What is the RGB and HSL of #646397?

#646397 is RGB 100, 99, 151 — HSL 241°, 21%, 49% — CMYK 34%, 34%, 0%, 41%.

What colors go with #646397?

Its complement is #969763; analogous partners are #637C97 and #7E6397. It also appears in 6+ palettes in our collection.

Can I use #646397 for text?

White text on #646397 has a contrast ratio of 5.57:1 (passes WCAG AA); black text gives 3.77:1.