Palettes / Colors / #128BBF

#128BBF — Vivid Blue

#128BBF is a blue color we call Vivid Blue, closest to the named color LightSeaGreen (#20B2AA). It belongs to the blue family.

Color name

Closest CSS keyword: lightseagreen (#20B2AA) — not an exact match. CSS lightseagreen gives you #20B2AA, a different color; use #128BBF 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.

#128BBF 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 #BF4612; it also sits naturally between #12BF9D and #1234BF. 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 7% · Green 55% · Blue 75%

Cyan 91% · Magenta 27% · Yellow 0% · Key 25%

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

Previews

CSS code for #128BBF

.text { color: #128BBF; }
.background { background-color: #128BBF; }
.border { border: 3px solid #128BBF; }
.text-rgb { color: rgb(18, 139, 191); }
.text-hsl { color: hsl(198, 83%, 41%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #128BBF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(18, 139, 191, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #128BBF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(18, 139, 191, 0.8); }

HTML: <p style="color:#128BBF">Text here</p> · <div style="background-color:#128BBF">Div content here</div>

Shades of #128BBF

Tints of #128BBF

Tones of #128BBF

Color harmonies

Complementary — #BF4612:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #128BBF: #000000.

Semi-transparent (opacity) text on #128BBF

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 #128BBF 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 #128BBF 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

← #128BBE  ·  #128BC0 →

Frequently asked questions

What color is #128BBF?

#128BBF is Vivid Blue, a blue color (RGB 18, 139, 191). Its closest standard named color is LightSeaGreen.

What is the RGB and HSL of #128BBF?

#128BBF is RGB 18, 139, 191 — HSL 198°, 83%, 41% — CMYK 91%, 27%, 0%, 25%.

What colors go with #128BBF?

Its complement is #BF4612; analogous partners are #12BF9D and #1234BF. It also appears in 6+ palettes in our collection.

Can I use #128BBF for text?

Black text on #128BBF has a contrast ratio of 5.47:1 (passes WCAG AA); white text gives 3.84:1.