What color is #10313C?

#10313C is a very dark cyan. In RGB it is rgb(16, 49, 60), and in HSL hsl(195, 58%, 15%).

Is #10313C accessible as text?

On white, #10313C has a contrast ratio of 13.76:1 (passes WCAG AA for body text); on black it is 1.53:1 (fails). For text placed on #10313C, use white for the best readability.

What is the closest Tailwind color to #10313C?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #10313C?

#10313C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3C1B10. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #10313C below.

Is #10313C good for buttons?

#10313C works well for buttons and highlights, but use white text on #10313C — black text only reaches 1.53:1, below the 4.5:1 needed for normal-size labels.

Is #10313C the same as CSS darkslategray?

No — #10313C is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#10313C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #10313C

Not just a swatch — here's how #10313C works with other colors. Named schemes with #10313C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #10313C Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

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 #10313C Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 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 #10313C Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #34505B

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 #10313C Secondary #6F5116 Surface #E2DCC0 Accent #385244 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 #10313C Secondary #485357 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.

Build a working theme in the generator →

Color Lab

How #10313C 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 30/100

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 28/100

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 17/100

Very low

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

UI accent fit 26/100

Low

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

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #10313C

For UI

For branding

For interior

For fashion

People also use #10313C with

Hunter Green Navy 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 13.8:1. Use

Subtle surface Use #C2DDE6 for cards and hover fills. Tint 80

Avoid beside #10233C — 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 #10313C 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: #10313C;
  --color-base-rgb: 16 49 60;
  --color-base-oklch: oklch(29.4% 0.043 223.2);
  --color-50: #F2FAFC;
  --color-100: #DEF1F7;
  --color-200: #BFE2EE;
  --color-300: #92CADD;
  --color-400: #69B1C9;
  --color-500: #4794AD;
  --color-600: #3D7385;
  --color-700: #30535F;
  --color-800: #23373E;
  --color-900: #172326;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F2FAFC',
    100: '#DEF1F7',
    200: '#BFE2EE',
    300: '#92CADD',
    400: '#69B1C9',
    500: '#4794AD',
    600: '#3D7385',
    700: '#30535F',
    800: '#23373E',
    900: '#172326',
  },
}

$base: #10313C;
$base-ink: #FFFFFF;
$base-50: #F2FAFC;
$base-100: #DEF1F7;
$base-200: #BFE2EE;
$base-300: #92CADD;
$base-400: #69B1C9;
$base-500: #4794AD;
$base-600: #3D7385;
$base-700: #30535F;
$base-800: #23373E;
$base-900: #172326;
$base-hover: #0D2730;
$base-subtle: #A1CCDB;

{
    "color": {
        "base": {
            "value": "#10313C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFC",
                "type": "color"
            },
            "100": {
                "value": "#DEF1F7",
                "type": "color"
            },
            "200": {
                "value": "#BFE2EE",
                "type": "color"
            },
            "300": {
                "value": "#92CADD",
                "type": "color"
            },
            "400": {
                "value": "#69B1C9",
                "type": "color"
            },
            "500": {
                "value": "#4794AD",
                "type": "color"
            },
            "600": {
                "value": "#3D7385",
                "type": "color"
            },
            "700": {
                "value": "#30535F",
                "type": "color"
            },
            "800": {
                "value": "#23373E",
                "type": "color"
            },
            "900": {
                "value": "#172326",
                "type": "color"
            }
        }
    }
}