What color is #313181?

#313181 is a dark blue-violet. In RGB it is rgb(49, 49, 129), and in HSL hsl(240, 45%, 35%).

Is #313181 accessible as text?

On white, #313181 has a contrast ratio of 11.13:1 (passes WCAG AA for body text); on black it is 1.89:1 (fails). For text placed on #313181, use white for the best readability.

What is the closest Tailwind color to #313181?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #313181?

#313181 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #818131. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #313181 below.

Is #313181 good for buttons?

#313181 works well for buttons and highlights, but use white text on #313181 — black text only reaches 1.89:1, below the 4.5:1 needed for normal-size labels.

Is #313181 the same as CSS darkslateblue?

No — #313181 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#313181 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313181

Not just a swatch — here's how #313181 works with other colors. Named schemes with #313181 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #313181 Anchor #141210 Accent #DC9758 Secondary #262833 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 #313181 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #251246

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.

Coastal Morning Lead · 5 colors

Lead #313181 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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

Vintage Leather Lead · 5 colors

Lead #313181 Secondary #7F4534 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 #313181 Secondary #5E627F Support #9D9088 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 #313181 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 24/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 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 37/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 51/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 62/100

High

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

Surface fit 21/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 80/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #313181

For UI

For branding

For interior

For fashion

People also use #313181 with

Teal Blue Eminence Olive Green 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 11.1:1. Use

Subtle surface Use #D3D3E9 for cards and hover fills. Tint 80

Avoid beside #4C3181 — 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 #313181 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: #313181;
  --color-base-rgb: 49 49 129;
  --color-base-oklch: oklch(36.4% 0.131 277.7);
  --color-50: #F4F4FB;
  --color-100: #E1E1F4;
  --color-200: #C4C4E8;
  --color-300: #9B9BD5;
  --color-400: #7474BE;
  --color-500: #5353A2;
  --color-600: #45457D;
  --color-700: #35355A;
  --color-800: #26263B;
  --color-900: #191925;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F4FB',
    100: '#E1E1F4',
    200: '#C4C4E8',
    300: '#9B9BD5',
    400: '#7474BE',
    500: '#5353A2',
    600: '#45457D',
    700: '#35355A',
    800: '#26263B',
    900: '#191925',
  },
}

$base: #313181;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E1E1F4;
$base-200: #C4C4E8;
$base-300: #9B9BD5;
$base-400: #7474BE;
$base-500: #5353A2;
$base-600: #45457D;
$base-700: #35355A;
$base-800: #26263B;
$base-900: #191925;
$base-hover: #272768;
$base-subtle: #BCBCDE;

{
    "color": {
        "base": {
            "value": "#313181",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E1F4",
                "type": "color"
            },
            "200": {
                "value": "#C4C4E8",
                "type": "color"
            },
            "300": {
                "value": "#9B9BD5",
                "type": "color"
            },
            "400": {
                "value": "#7474BE",
                "type": "color"
            },
            "500": {
                "value": "#5353A2",
                "type": "color"
            },
            "600": {
                "value": "#45457D",
                "type": "color"
            },
            "700": {
                "value": "#35355A",
                "type": "color"
            },
            "800": {
                "value": "#26263B",
                "type": "color"
            },
            "900": {
                "value": "#191925",
                "type": "color"
            }
        }
    }
}

Palettes built on #313181

Color Lab

Pairs with #313181

UI roles & guardrails

In real applications

Scales

Every model

Export