Palettes / Colors / #604ECB

#604ECB — Blue

#604ECB 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 #604ECB 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.

#604ECB 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 #B8CB4D; it also sits naturally between #4D79CB and #9F4DCB. 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 38% · Green 31% · Blue 80%

Cyan 53% · Magenta 62% · Yellow 0% · Key 20%

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

Previews

CSS code for #604ECB

.text { color: #604ECB; }
.background { background-color: #604ECB; }
.border { border: 3px solid #604ECB; }
.text-rgb { color: rgb(96, 78, 203); }
.text-hsl { color: hsl(249, 55%, 55%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #604ECB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(96, 78, 203, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #604ECB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(96, 78, 203, 0.8); }

HTML: <p style="color:#604ECB">Text here</p> · <div style="background-color:#604ECB">Div content here</div>

Shades of #604ECB

Tints of #604ECB

Tones of #604ECB

Color harmonies

Complementary — #B8CB4D:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #604ECB: #FFFFFF.

Semi-transparent (opacity) text on #604ECB

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 #604ECB 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 #604ECB 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

← #604ECA  ·  #604ECC →

Frequently asked questions

What color is #604ECB?

#604ECB is Blue, a blue color (RGB 96, 78, 203). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #604ECB?

#604ECB is RGB 96, 78, 203 — HSL 249°, 55%, 55% — CMYK 53%, 62%, 0%, 20%.

What colors go with #604ECB?

Its complement is #B8CB4D; analogous partners are #4D79CB and #9F4DCB. It also appears in 6+ palettes in our collection.

Can I use #604ECB for text?

White text on #604ECB has a contrast ratio of 6.09:1 (passes WCAG AA); black text gives 3.45:1.