Palettes / Colors / #237BCF

#237BCF — Blue

#237BCF is a blue color we call 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 #237BCF 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.

#237BCF 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 #CD7523; it also sits naturally between #23CDCA and #2326CD. 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 14% · Green 48% · Blue 81%

Cyan 83% · Magenta 41% · Yellow 0% · Key 19%

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

Previews

CSS code for #237BCF

.text { color: #237BCF; }
.background { background-color: #237BCF; }
.border { border: 3px solid #237BCF; }
.text-rgb { color: rgb(35, 123, 207); }
.text-hsl { color: hsl(209, 71%, 47%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #237BCF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(35, 123, 207, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #237BCF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(35, 123, 207, 0.8); }

HTML: <p style="color:#237BCF">Text here</p> · <div style="background-color:#237BCF">Div content here</div>

Shades of #237BCF

Tints of #237BCF

Tones of #237BCF

Color harmonies

Complementary — #CD7523:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #237BCF: #000000.

Semi-transparent (opacity) text on #237BCF

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 #237BCF 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 #237BCF 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

← #237BCE  ·  #237BD0 →

Frequently asked questions

What color is #237BCF?

#237BCF is Blue, a blue color (RGB 35, 123, 207). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #237BCF?

#237BCF is RGB 35, 123, 207 — HSL 209°, 71%, 47% — CMYK 83%, 41%, 0%, 19%.

What colors go with #237BCF?

Its complement is #CD7523; analogous partners are #23CDCA and #2326CD. It also appears in 6+ palettes in our collection.

Can I use #237BCF for text?

Black text on #237BCF has a contrast ratio of 4.81:1 (passes WCAG AA); white text gives 4.37:1.