What color is #153138?

#153138 is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(21, 49, 56), and in HSL hsl(192, 45%, 15%).

Is #153138 accessible as text?

On white, #153138 has a contrast ratio of 13.74:1 (passes WCAG AA for body text); on black it is 1.53:1 (fails). For text placed on #153138, use white for the best readability.

What is the closest Tailwind color to #153138?

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

What colors go well with #153138?

As a neutral, #153138 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 #153138 the same as CSS darkslategray?

No — #153138 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.

#153138 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #153138

Not just a swatch — here's how #153138 works with other colors. Named schemes with #153138 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #153138 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E3549

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 #153138 Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 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 #153138 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #375057

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 #153138 Secondary #705116 Surface #E3DCC0 Accent #395244 Anchor #56233E

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 #153138 Secondary #4A5355 Support #969386 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 #153138 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 40/100

Neutral

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

High

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 27/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 14/100

Very low

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

UI accent fit 25/100

Low

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

Surface fit 55/100

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 #153138

For UI

For branding

For interior

For fashion

People also use #153138 with

Castleton Green Graphite Bistre Platinum Dark Slate Gray

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 13.7:1. Use

Subtle surface Use #C6DCE2 for cards and hover fills. Tint 80

Avoid beside #152537 — 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 #153138 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: #153138;
  --color-base-rgb: 21 49 56;
  --color-base-oklch: oklch(29.5% 0.036 216.2);
  --color-50: #F4FAFB;
  --color-100: #E1F0F4;
  --color-200: #C4E1E8;
  --color-300: #9BC9D5;
  --color-400: #74AFBE;
  --color-500: #5392A2;
  --color-600: #45727D;
  --color-700: #35525A;
  --color-800: #26373B;
  --color-900: #192225;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F4FAFB',
    100: '#E1F0F4',
    200: '#C4E1E8',
    300: '#9BC9D5',
    400: '#74AFBE',
    500: '#5392A2',
    600: '#45727D',
    700: '#35525A',
    800: '#26373B',
    900: '#192225',
  },
}

$base: #153138;
$base-ink: #FFFFFF;
$base-50: #F4FAFB;
$base-100: #E1F0F4;
$base-200: #C4E1E8;
$base-300: #9BC9D5;
$base-400: #74AFBE;
$base-500: #5392A2;
$base-600: #45727D;
$base-700: #35525A;
$base-800: #26373B;
$base-900: #192225;
$base-hover: #11272C;
$base-subtle: #A8CBD4;

{
    "color": {
        "base": {
            "value": "#153138",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FAFB",
                "type": "color"
            },
            "100": {
                "value": "#E1F0F4",
                "type": "color"
            },
            "200": {
                "value": "#C4E1E8",
                "type": "color"
            },
            "300": {
                "value": "#9BC9D5",
                "type": "color"
            },
            "400": {
                "value": "#74AFBE",
                "type": "color"
            },
            "500": {
                "value": "#5392A2",
                "type": "color"
            },
            "600": {
                "value": "#45727D",
                "type": "color"
            },
            "700": {
                "value": "#35525A",
                "type": "color"
            },
            "800": {
                "value": "#26373B",
                "type": "color"
            },
            "900": {
                "value": "#192225",
                "type": "color"
            }
        }
    }
}