Palettes / Colors / #6366BF

#6366BF — Muted Blue

#6366BF is a blue color we call Muted Blue, closest to the named color SlateBlue (#6A5ACD). It belongs to the blue family.

#6366BF 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 #BFBC63; it also sits naturally between #6394BF and #8E63BF. 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 40% · Blue 75%

Cyan 48% · Magenta 47% · Yellow 0% · Key 25%

Previews

CSS code for #6366BF

.text { color: #6366BF; }
.background { background-color: #6366BF; }
.border { border: 3px solid #6366BF; }
.text-rgb { color: rgb(99, 102, 191); }
.text-hsl { color: hsl(238, 42%, 57%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #6366BF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(99, 102, 191, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #6366BF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(99, 102, 191, 0.8); }

HTML: <p style="color:#6366BF">Text here</p> · <div style="background-color:#6366BF">Div content here</div>

Shades of #6366BF

Tints of #6366BF

Tones of #6366BF

Color harmonies

Complementary — #BFBC63:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #6366BF: #FFFFFF.

How #6366BF 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 #6366BF or a close neighbour

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #6366BE  ·  #6366C0 →

Frequently asked questions

What color is #6366BF?

#6366BF is Muted Blue, a blue color (RGB 99, 102, 191). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #6366BF?

#6366BF is RGB 99, 102, 191 — HSL 238°, 42%, 57% — CMYK 48%, 47%, 0%, 25%.

What colors go with #6366BF?

Its complement is #BFBC63; analogous partners are #6394BF and #8E63BF. It also appears in 6+ palettes in our collection.

Can I use #6366BF for text?

White text on #6366BF has a contrast ratio of 5.02:1 (passes WCAG AA); black text gives 4.18:1.