What color is #646C81?

#646C81 is a medium low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(100, 108, 129), and in HSL hsl(223, 13%, 45%).

Is #646C81 accessible as text?

On white, #646C81 has a contrast ratio of 5.24:1 (passes WCAG AA for body text); on black it is 4.00:1 (fails). For text placed on #646C81, use white for the best readability.

What is the closest Tailwind color to #646C81?

The nearest Tailwind CSS token is gray-500 (#6A7282).

What colors go well with #646C81?

As a neutral, #646C81 pairs cleanly with either light or dark text depending on the surface, and sits under accent hues like blue, violet, emerald or warm orange — use it as a muted neutral, divider, icon or disabled-state color and let the accent carry the color.

Is #646C81 the same as CSS dimgray?

No — #646C81 is not the CSS named color dimgray, but dimgray (#696969) is the closest CSS named color.

#646C81 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #646C81

Not just a swatch — here's how #646C81 works with other colors. Named schemes with #646C81 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #646C81 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Dim Gray 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 #646C81 Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Dim Gray 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 #646C81 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8890A3

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

Vintage Leather Lead · 5 colors

Lead #646C81 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Dim Gray 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 #F8F4EF Accent #646C81 Secondary #93969E Support #9D8F88 Ink #18140F

Dim Gray 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 Dim Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #646C81 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 42/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 53/100

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 44/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 13/100

Very low

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

UI accent fit 63/100

High

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

Surface fit 45/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 94/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #646C81

For UI

For branding

For interior

For fashion

People also use #646C81 with

Pewter Dim Gray 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 5.2:1. Use

Subtle surface Use #E0E2E6 for cards and hover fills. Tint 80

Avoid beside #656482 — 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 #646C81 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: #646C81;
  --color-base-rgb: 100 108 129;
  --color-base-oklch: oklch(53.2% 0.034 268.8);
  --color-50: #F6F7F8;
  --color-100: #E8E9ED;
  --color-200: #D1D4DB;
  --color-300: #AFB4C0;
  --color-400: #8E94A4;
  --color-500: #6F7586;
  --color-600: #595D69;
  --color-700: #42454D;
  --color-800: #2D2F34;
  --color-900: #1D1E20;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dim-gray: {
    50: '#F6F7F8',
    100: '#E8E9ED',
    200: '#D1D4DB',
    300: '#AFB4C0',
    400: '#8E94A4',
    500: '#6F7586',
    600: '#595D69',
    700: '#42454D',
    800: '#2D2F34',
    900: '#1D1E20',
  },
}

$base: #646C81;
$base-ink: #FFFFFF;
$base-50: #F6F7F8;
$base-100: #E8E9ED;
$base-200: #D1D4DB;
$base-300: #AFB4C0;
$base-400: #8E94A4;
$base-500: #6F7586;
$base-600: #595D69;
$base-700: #42454D;
$base-800: #2D2F34;
$base-900: #1D1E20;
$base-hover: #505768;
$base-subtle: #D1D3D9;

{
    "color": {
        "base": {
            "value": "#646C81",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F8",
                "type": "color"
            },
            "100": {
                "value": "#E8E9ED",
                "type": "color"
            },
            "200": {
                "value": "#D1D4DB",
                "type": "color"
            },
            "300": {
                "value": "#AFB4C0",
                "type": "color"
            },
            "400": {
                "value": "#8E94A4",
                "type": "color"
            },
            "500": {
                "value": "#6F7586",
                "type": "color"
            },
            "600": {
                "value": "#595D69",
                "type": "color"
            },
            "700": {
                "value": "#42454D",
                "type": "color"
            },
            "800": {
                "value": "#2D2F34",
                "type": "color"
            },
            "900": {
                "value": "#1D1E20",
                "type": "color"
            }
        }
    }
}

Palettes built on #646C81

Color Lab

Pairs with #646C81

UI roles & guardrails

In real applications

Scales

Every model

Export