What color is #55899B?

#55899B is a medium, muted cyan. In RGB it is rgb(85, 137, 155), and in HSL hsl(195, 29%, 47%).

Is #55899B accessible as text?

On white, #55899B has a contrast ratio of 3.86:1 (fails WCAG AA for body text); on black it is 5.44:1 (passes). For text placed on #55899B, use black for the best readability.

What is the closest Tailwind color to #55899B?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #55899B?

#55899B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9B6655. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #55899B below.

Is #55899B good for buttons?

#55899B works well for buttons and highlights, but use black text on #55899B — white text only reaches 3.86:1, below the 4.5:1 needed for normal-size labels.

Is #55899B the same as CSS slategray?

No — #55899B is not the CSS named color slategray, but slategray (#708090) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#55899B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #55899B

Not just a swatch — here's how #55899B works with other colors. Named schemes with #55899B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #55899B Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

Air Force Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #55899B Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

Air Force Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #55899B Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #7EADBE

Air Force Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Air Force Blue.

Vintage Leather Lead · 5 colors

Lead #55899B Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233E

Air Force Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #55899B Secondary #9DAEB5 Support #969386 Ink #16140F

Air Force Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Air Force Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #55899B actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 32/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 55/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 24/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 71/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 43/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #55899B

For UI

For branding

For interior

For fashion

People also use #55899B with

Verdigris Very Peri Mocha Platinum Dark Slate Gray

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.8:1. Use

Subtle surface Use #DEE7EA for cards and hover fills. Tint 80

Avoid beside #55729B — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #55899B at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #55899B;
  --color-base-rgb: 85 137 155;
  --color-base-oklch: oklch(60.0% 0.062 222.0);
  --color-50: #F5F9FA;
  --color-100: #E4EEF1;
  --color-200: #CADCE2;
  --color-300: #A5C1CA;
  --color-400: #81A5B1;
  --color-500: #618794;
  --color-600: #4F6A73;
  --color-700: #3C4D53;
  --color-800: #293437;
  --color-900: #1B2123;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  air-force-blue: {
    50: '#F5F9FA',
    100: '#E4EEF1',
    200: '#CADCE2',
    300: '#A5C1CA',
    400: '#81A5B1',
    500: '#618794',
    600: '#4F6A73',
    700: '#3C4D53',
    800: '#293437',
    900: '#1B2123',
  },
}

$base: #55899B;
$base-ink: #141310;
$base-50: #F5F9FA;
$base-100: #E4EEF1;
$base-200: #CADCE2;
$base-300: #A5C1CA;
$base-400: #81A5B1;
$base-500: #618794;
$base-600: #4F6A73;
$base-700: #3C4D53;
$base-800: #293437;
$base-900: #1B2123;
$base-hover: #446E7C;
$base-subtle: #CEDBDF;

{
    "color": {
        "base": {
            "value": "#55899B",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F9FA",
                "type": "color"
            },
            "100": {
                "value": "#E4EEF1",
                "type": "color"
            },
            "200": {
                "value": "#CADCE2",
                "type": "color"
            },
            "300": {
                "value": "#A5C1CA",
                "type": "color"
            },
            "400": {
                "value": "#81A5B1",
                "type": "color"
            },
            "500": {
                "value": "#618794",
                "type": "color"
            },
            "600": {
                "value": "#4F6A73",
                "type": "color"
            },
            "700": {
                "value": "#3C4D53",
                "type": "color"
            },
            "800": {
                "value": "#293437",
                "type": "color"
            },
            "900": {
                "value": "#1B2123",
                "type": "color"
            }
        }
    }
}

Palettes built on #55899B

Color Lab

Pairs with #55899B

UI roles & guardrails

In real applications

Scales

Every model

Export