Palettes / Colors / #645ADD

#645ADD — Blue

#645ADD is a blue color we call 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 #645ADD 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.

#645ADD is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #D2DD5A; it also sits naturally between #5A91DD and #A65ADD. 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 35% · Blue 87%

Cyan 55% · Magenta 59% · Yellow 0% · Key 13%

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

Previews

CSS code for #645ADD

.text { color: #645ADD; }
.background { background-color: #645ADD; }
.border { border: 3px solid #645ADD; }
.text-rgb { color: rgb(100, 90, 221); }
.text-hsl { color: hsl(245, 66%, 61%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #645ADD; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(100, 90, 221, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #645ADD; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(100, 90, 221, 0.8); }

HTML: <p style="color:#645ADD">Text here</p> · <div style="background-color:#645ADD">Div content here</div>

Shades of #645ADD

Tints of #645ADD

Tones of #645ADD

Color harmonies

Complementary — #D2DD5A:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #645ADD: #FFFFFF.

Semi-transparent (opacity) text on #645ADD

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 #645ADD 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 #645ADD 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

← #645ADC  ·  #645ADE →

Frequently asked questions

What color is #645ADD?

#645ADD is Blue, a blue color (RGB 100, 90, 221). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #645ADD?

#645ADD is RGB 100, 90, 221 — HSL 245°, 66%, 61% — CMYK 55%, 59%, 0%, 13%.

What colors go with #645ADD?

Its complement is #D2DD5A; analogous partners are #5A91DD and #A65ADD. It also appears in 6+ palettes in our collection.

Can I use #645ADD for text?

White text on #645ADD has a contrast ratio of 5.19:1 (passes WCAG AA); black text gives 4.05:1.