What color is #5B728B?

#5B728B is a medium, muted blue. In RGB it is rgb(91, 114, 139), and in HSL hsl(211, 21%, 45%).

Is #5B728B accessible as text?

On white, #5B728B has a contrast ratio of 4.97:1 (passes WCAG AA for body text); on black it is 4.22:1 (fails). For text placed on #5B728B, use white for the best readability.

What is the closest Tailwind color to #5B728B?

The nearest Tailwind CSS token is mist-500 (#67787C).

What colors go well with #5B728B?

#5B728B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8B745B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #5B728B below.

Is #5B728B good for buttons?

#5B728B works well for buttons and highlights, but use white text on #5B728B — black text only reaches 4.22:1, below the 4.5:1 needed for normal-size labels.

Is #5B728B the same as CSS slategray?

No — #5B728B 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.

#5B728B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #5B728B

Not just a swatch — here's how #5B728B works with other colors. Named schemes with #5B728B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #5B728B Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Teal 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 #5B728B Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Teal 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 #5B728B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #8096AD

Teal 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 Teal Blue.

Vintage Leather Lead · 5 colors

Lead #5B728B Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Teal 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 #5B728B Secondary #929AA4 Support #959386 Ink #16140F

Teal 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 Teal Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #5B728B 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 37/100

Cool

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

Softness 52/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 44/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 47/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 18/100

Very low

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

UI accent fit 70/100

High

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

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #5B728B

For UI

For branding

For interior

For fashion

People also use #5B728B with

Cadet Blue Ultra Violet Shadow Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

Body text Passes on white at 16px and above. Pass

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

Background Pair with white text at 5.0:1. Use

Subtle surface Use #DFE3E7 for cards and hover fills. Tint 80

Avoid beside #5B628B — 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 #5B728B at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #5B728B;
  --color-base-rgb: 91 114 139;
  --color-base-oklch: oklch(54.3% 0.048 250.8);
  --color-50: #F6F7F9;
  --color-100: #E6EAEF;
  --color-200: #CED6DF;
  --color-300: #AAB7C5;
  --color-400: #8898AA;
  --color-500: #687A8D;
  --color-600: #54606E;
  --color-700: #3F4750;
  --color-800: #2B3035;
  --color-900: #1C1F21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  teal-blue: {
    50: '#F6F7F9',
    100: '#E6EAEF',
    200: '#CED6DF',
    300: '#AAB7C5',
    400: '#8898AA',
    500: '#687A8D',
    600: '#54606E',
    700: '#3F4750',
    800: '#2B3035',
    900: '#1C1F21',
  },
}

$base: #5B728B;
$base-ink: #FFFFFF;
$base-50: #F6F7F9;
$base-100: #E6EAEF;
$base-200: #CED6DF;
$base-300: #AAB7C5;
$base-400: #8898AA;
$base-500: #687A8D;
$base-600: #54606E;
$base-700: #3F4750;
$base-800: #2B3035;
$base-900: #1C1F21;
$base-hover: #495B6F;
$base-subtle: #CED5DC;

{
    "color": {
        "base": {
            "value": "#5B728B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EAEF",
                "type": "color"
            },
            "200": {
                "value": "#CED6DF",
                "type": "color"
            },
            "300": {
                "value": "#AAB7C5",
                "type": "color"
            },
            "400": {
                "value": "#8898AA",
                "type": "color"
            },
            "500": {
                "value": "#687A8D",
                "type": "color"
            },
            "600": {
                "value": "#54606E",
                "type": "color"
            },
            "700": {
                "value": "#3F4750",
                "type": "color"
            },
            "800": {
                "value": "#2B3035",
                "type": "color"
            },
            "900": {
                "value": "#1C1F21",
                "type": "color"
            }
        }
    }
}

Palettes built on #5B728B

Color Lab

Pairs with #5B728B

UI roles & guardrails

In real applications

Scales

Every model

Export