What color is #25303C?

#25303C is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(37, 48, 60), and in HSL hsl(211, 24%, 19%).

Is #25303C accessible as text?

On white, #25303C has a contrast ratio of 13.40:1 (passes WCAG AA for body text); on black it is 1.57:1 (fails). For text placed on #25303C, use white for the best readability.

What is the closest Tailwind color to #25303C?

The nearest Tailwind CSS token is gray-800 (#1E2939).

What colors go well with #25303C?

As a neutral, #25303C pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #25303C the same as CSS darkslategray?

No — #25303C is not the CSS named color darkslategray, but darkslategray (#2F4F4F) 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.

#25303C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #25303C

Not just a swatch — here's how #25303C works with other colors. Named schemes with #25303C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #25303C Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Gunmetal 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 #25303C Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Gunmetal 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 #25303C Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #454F5B

Gunmetal 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 Gunmetal Gray.

Vintage Leather Lead · 5 colors

Lead #25303C Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

Gunmetal 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 #F6F4EF Accent #25303C Secondary #505459 Support #959386 Ink #16140F

Gunmetal 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 Gunmetal Gray carrying the quiet middle.

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Color Lab

How #25303C 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 43/100

Neutral

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 65/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 10/100

Very low

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

UI accent fit 24/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 57/100

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 #25303C

For UI

For branding

For interior

For fashion

People also use #25303C with

Dark Slate Gray Gunmetal Gray Bistre Gainsboro Charcoal

UI roles & guardrails

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

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 13.4:1. Use

Subtle surface Use #CFD5DD for cards and hover fills. Tint 80

Avoid beside #25283C — 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 #25303C at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #25303C;
  --color-base-rgb: 37 48 60;
  --color-base-oklch: oklch(30.4% 0.026 250.9);
  --color-50: #F5F7F9;
  --color-100: #E5EAF0;
  --color-200: #CCD6E0;
  --color-300: #A8B7C7;
  --color-400: #8598AD;
  --color-500: #657A90;
  --color-600: #526070;
  --color-700: #3E4751;
  --color-800: #2B3036;
  --color-900: #1B1E22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5F7F9',
    100: '#E5EAF0',
    200: '#CCD6E0',
    300: '#A8B7C7',
    400: '#8598AD',
    500: '#657A90',
    600: '#526070',
    700: '#3E4751',
    800: '#2B3036',
    900: '#1B1E22',
  },
}

$base: #25303C;
$base-ink: #FFFFFF;
$base-50: #F5F7F9;
$base-100: #E5EAF0;
$base-200: #CCD6E0;
$base-300: #A8B7C7;
$base-400: #8598AD;
$base-500: #657A90;
$base-600: #526070;
$base-700: #3E4751;
$base-800: #2B3036;
$base-900: #1B1E22;
$base-hover: #1D2630;
$base-subtle: #B6C1CC;

{
    "color": {
        "base": {
            "value": "#25303C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E5EAF0",
                "type": "color"
            },
            "200": {
                "value": "#CCD6E0",
                "type": "color"
            },
            "300": {
                "value": "#A8B7C7",
                "type": "color"
            },
            "400": {
                "value": "#8598AD",
                "type": "color"
            },
            "500": {
                "value": "#657A90",
                "type": "color"
            },
            "600": {
                "value": "#526070",
                "type": "color"
            },
            "700": {
                "value": "#3E4751",
                "type": "color"
            },
            "800": {
                "value": "#2B3036",
                "type": "color"
            },
            "900": {
                "value": "#1B1E22",
                "type": "color"
            }
        }
    }
}