Palettes / Colors / #258BCB

#258BCB — Blue

#258BCB is a blue color we call Blue, closest to the named color SteelBlue (#4682B4). It belongs to the blue family.

Color name

Closest CSS keyword: steelblue (#4682B4) — not an exact match. CSS steelblue gives you #4682B4, a different color; use #258BCB 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.

#258BCB 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 #CB6525; it also sits naturally between #25CBB7 and #2538CB. 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 15% · Green 55% · Blue 80%

Cyan 82% · Magenta 32% · Yellow 0% · Key 20%

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

Previews

CSS code for #258BCB

.text { color: #258BCB; }
.background { background-color: #258BCB; }
.border { border: 3px solid #258BCB; }
.text-rgb { color: rgb(37, 139, 203); }
.text-hsl { color: hsl(203, 69%, 47%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #258BCB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(37, 139, 203, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #258BCB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(37, 139, 203, 0.8); }

HTML: <p style="color:#258BCB">Text here</p> · <div style="background-color:#258BCB">Div content here</div>

Shades of #258BCB

Tints of #258BCB

Tones of #258BCB

Color harmonies

Complementary — #CB6525:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #258BCB: #000000.

Semi-transparent (opacity) text on #258BCB

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 #258BCB 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 #258BCB 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

← #258BCA  ·  #258BCC →

Frequently asked questions

What color is #258BCB?

#258BCB is Blue, a blue color (RGB 37, 139, 203). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #258BCB?

#258BCB is RGB 37, 139, 203 — HSL 203°, 69%, 47% — CMYK 82%, 32%, 0%, 20%.

What colors go with #258BCB?

Its complement is #CB6525; analogous partners are #25CBB7 and #2538CB. It also appears in 6+ palettes in our collection.

Can I use #258BCB for text?

Black text on #258BCB has a contrast ratio of 5.63:1 (passes WCAG AA); white text gives 3.73:1.