What color is #313C76?

#313C76 is a dark blue-violet. In RGB it is rgb(49, 60, 118), and in HSL hsl(230, 41%, 33%).

Is #313C76 accessible as text?

On white, #313C76 has a contrast ratio of 10.30:1 (passes WCAG AA for body text); on black it is 2.04:1 (fails). For text placed on #313C76, use white for the best readability.

What is the closest Tailwind color to #313C76?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #313C76?

#313C76 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #776B32. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #313C76 below.

Is #313C76 good for buttons?

#313C76 works well for buttons and highlights, but use white text on #313C76 — black text only reaches 2.04:1, below the 4.5:1 needed for normal-size labels.

Is #313C76 the same as CSS darkslateblue?

No — #313C76 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#313C76 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313C76

Not just a swatch — here's how #313C76 works with other colors. Named schemes with #313C76 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #313C76 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Dark Slate Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Luxury Packaging Feature · 5 colors

Feature #313C76 Anchor #141210 Accent #DC9659 Secondary #252833 Surface #F3ECE3

Dark Slate Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #313C76 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #241C42

Dark Slate Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Dark Slate Blue.

Vintage Leather Lead · 5 colors

Lead #313C76 Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Dark Slate Blue 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 #313C76 Secondary #61687D Support #9D8F88 Ink #18140F

Dark Slate Blue 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 Dark Slate Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #313C76 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 28/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 33/100

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 46/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 63/100

High

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

Surface fit 30/100

Low

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #313C76

For UI

For branding

For interior

For fashion

People also use #313C76 with

Teal Blue Dark Slate Blue Olive Brown Gainsboro Prussian Blue

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 10.3:1. Use

Subtle surface Use #D3D6E7 for cards and hover fills. Tint 80

Avoid beside #3D3277 — 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 #313C76 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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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: #313C76;
  --color-base-rgb: 49 60 118;
  --color-base-oklch: oklch(37.8% 0.099 272.7);
  --color-50: #F4F5FB;
  --color-100: #E2E5F3;
  --color-200: #C6CBE7;
  --color-300: #9DA6D2;
  --color-400: #7782BB;
  --color-500: #56629E;
  --color-600: #47507A;
  --color-700: #373C58;
  --color-800: #272A3A;
  --color-900: #191B24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F5FB',
    100: '#E2E5F3',
    200: '#C6CBE7',
    300: '#9DA6D2',
    400: '#7782BB',
    500: '#56629E',
    600: '#47507A',
    700: '#373C58',
    800: '#272A3A',
    900: '#191B24',
  },
}

$base: #313C76;
$base-ink: #FFFFFF;
$base-50: #F4F5FB;
$base-100: #E2E5F3;
$base-200: #C6CBE7;
$base-300: #9DA6D2;
$base-400: #7782BB;
$base-500: #56629E;
$base-600: #47507A;
$base-700: #373C58;
$base-800: #272A3A;
$base-900: #191B24;
$base-hover: #28315F;
$base-subtle: #BCC1DC;

{
    "color": {
        "base": {
            "value": "#313C76",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F5FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E5F3",
                "type": "color"
            },
            "200": {
                "value": "#C6CBE7",
                "type": "color"
            },
            "300": {
                "value": "#9DA6D2",
                "type": "color"
            },
            "400": {
                "value": "#7782BB",
                "type": "color"
            },
            "500": {
                "value": "#56629E",
                "type": "color"
            },
            "600": {
                "value": "#47507A",
                "type": "color"
            },
            "700": {
                "value": "#373C58",
                "type": "color"
            },
            "800": {
                "value": "#272A3A",
                "type": "color"
            },
            "900": {
                "value": "#191B24",
                "type": "color"
            }
        }
    }
}

Palettes built on #313C76

Color Lab

Pairs with #313C76

UI roles & guardrails

In real applications

Scales

Every model

Export