What color is #313A55?

#313A55 is a dark, muted blue. In RGB it is rgb(49, 58, 85), and in HSL hsl(225, 27%, 26%).

Is #313A55 accessible as text?

On white, #313A55 has a contrast ratio of 11.25:1 (passes WCAG AA for body text); on black it is 1.87:1 (fails). For text placed on #313A55, use white for the best readability.

What is the closest Tailwind color to #313A55?

The nearest Tailwind CSS token is mauve-700 (#463947).

What colors go well with #313A55?

#313A55 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #544B30. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #313A55 below.

Is #313A55 good for buttons?

#313A55 works well for buttons and highlights, but use white text on #313A55 — black text only reaches 1.87:1, below the 4.5:1 needed for normal-size labels.

Is #313A55 the same as CSS darkslategray?

No — #313A55 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#313A55 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313A55

Not just a swatch — here's how #313A55 works with other colors. Named schemes with #313A55 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #313A55 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Charcoal 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 #313A55 Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Charcoal 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 #313A55 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #525B75

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

Vintage Leather Lead · 5 colors

Lead #313A55 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Charcoal 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 #313A55 Secondary #5D616B Support #9D8F88 Ink #18140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #313A55 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 39/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 19/100

Very low

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

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #313A55

For UI

For branding

For interior

For fashion

People also use #313A55 with

Feldgrau Onyx Army Green 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 11.2:1. Use

Subtle surface Use #D2D6E1 for cards and hover fills. Tint 80

Avoid beside #333054 — 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 #313A55 at work across the surfaces designers actually ship.

Website / UI

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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: #313A55;
  --color-base-rgb: 49 58 85;
  --color-base-oklch: oklch(35.3% 0.049 269.7);
  --color-50: #F5F6FA;
  --color-100: #E5E8F0;
  --color-200: #CBD1E1;
  --color-300: #A6AFC9;
  --color-400: #838EAF;
  --color-500: #636F92;
  --color-600: #505872;
  --color-700: #3D4252;
  --color-800: #2A2D37;
  --color-900: #1B1D22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F6FA',
    100: '#E5E8F0',
    200: '#CBD1E1',
    300: '#A6AFC9',
    400: '#838EAF',
    500: '#636F92',
    600: '#505872',
    700: '#3D4252',
    800: '#2A2D37',
    900: '#1B1D22',
  },
}

$base: #313A55;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E5E8F0;
$base-200: #CBD1E1;
$base-300: #A6AFC9;
$base-400: #838EAF;
$base-500: #636F92;
$base-600: #505872;
$base-700: #3D4252;
$base-800: #2A2D37;
$base-900: #1B1D22;
$base-hover: #272E43;
$base-subtle: #BBC1D2;

{
    "color": {
        "base": {
            "value": "#313A55",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E5E8F0",
                "type": "color"
            },
            "200": {
                "value": "#CBD1E1",
                "type": "color"
            },
            "300": {
                "value": "#A6AFC9",
                "type": "color"
            },
            "400": {
                "value": "#838EAF",
                "type": "color"
            },
            "500": {
                "value": "#636F92",
                "type": "color"
            },
            "600": {
                "value": "#505872",
                "type": "color"
            },
            "700": {
                "value": "#3D4252",
                "type": "color"
            },
            "800": {
                "value": "#2A2D37",
                "type": "color"
            },
            "900": {
                "value": "#1B1D22",
                "type": "color"
            }
        }
    }
}