Palettes / Colors / #646BEE

#646BEE — Light Vivid Blue

#646BEE is a blue color we call Light Vivid Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

Color name

Closest CSS keyword: royalblue (#4169E1) — not an exact match. CSS royalblue gives you #4169E1, a different color; use #646BEE 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.

#646BEE 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 #EEE763; it also sits naturally between #63AFEE and #A163EE. 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 42% · Blue 93%

Cyan 58% · Magenta 55% · Yellow 0% · Key 7%

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

Previews

CSS code for #646BEE

.text { color: #646BEE; }
.background { background-color: #646BEE; }
.border { border: 3px solid #646BEE; }
.text-rgb { color: rgb(100, 107, 238); }
.text-hsl { color: hsl(237, 80%, 66%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #646BEE; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(100, 107, 238, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #646BEE; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(100, 107, 238, 0.8); }

HTML: <p style="color:#646BEE">Text here</p> · <div style="background-color:#646BEE">Div content here</div>

Shades of #646BEE

Tints of #646BEE

Tones of #646BEE

Color harmonies

Complementary — #EEE763:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #646BEE: #000000.

Semi-transparent (opacity) text on #646BEE

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 #646BEE 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 #646BEE 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

← #646BED  ·  #646BEF →

Frequently asked questions

What color is #646BEE?

#646BEE is Light Vivid Blue, a blue color (RGB 100, 107, 238). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #646BEE?

#646BEE is RGB 100, 107, 238 — HSL 237°, 80%, 66% — CMYK 58%, 55%, 0%, 7%.

What colors go with #646BEE?

Its complement is #EEE763; analogous partners are #63AFEE and #A163EE. It also appears in 6+ palettes in our collection.

Can I use #646BEE for text?

Black text on #646BEE has a contrast ratio of 4.88:1 (passes WCAG AA); white text gives 4.30:1.