What color is #684BC8?

#684BC8 is a medium indigo. In RGB it is rgb(104, 75, 200), and in HSL hsl(254, 53%, 54%).

Is #684BC8 accessible as text?

On white, #684BC8 has a contrast ratio of 6.12:1 (passes WCAG AA for body text); on black it is 3.43:1 (fails). For text placed on #684BC8, use white for the best readability.

What is the closest Tailwind color to #684BC8?

The nearest Tailwind CSS token is violet-700 (#7008E7).

What colors go well with #684BC8?

#684BC8 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #ABC84C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #684BC8 below.

Is #684BC8 good for buttons?

#684BC8 works well for buttons and highlights, but use white text on #684BC8 — black text only reaches 3.43:1, below the 4.5:1 needed for normal-size labels.

Is #684BC8 the same as CSS slateblue?

No — #684BC8 is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#684BC8 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #684BC8

Not just a swatch — here's how #684BC8 works with other colors. Named schemes with #684BC8 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #684BC8 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8975E7

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

Berry & Cream Lead · 5 colors

Lead #684BC8 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

Slate Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #684BC8 Secondary #8E8AB6 Support #9D9088 Ink #18140F

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 Slate Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #684BC8 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

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

Sunset Warmth Glow · 5 colors

Glow #684BC8 Secondary #E86A6E Accent #F5934B Anchor #583B57 Surface #F7E7D7

Slate Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #684BC8 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 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 71/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 92/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 75/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #684BC8

For UI

For branding

For interior

For fashion

People also use #684BC8 with

Cornflower Blue Medium Orchid Yellow Green Gainsboro Russian Violet

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 6.1:1. Use

Subtle surface Use #E3DFF0 for cards and hover fills. Tint 80

Avoid beside #924CC8 — 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 #684BC8 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: #684BC8;
  --color-base-rgb: 104 75 200;
  --color-base-oklch: oklch(51.3% 0.185 288.8);
  --color-50: #F5F3FC;
  --color-100: #E5DFF6;
  --color-200: #CBC1EC;
  --color-300: #A595DA;
  --color-400: #826DC5;
  --color-500: #624CA9;
  --color-600: #4F4082;
  --color-700: #3C325D;
  --color-800: #2A243D;
  --color-900: #1B1726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  slate-blue: {
    50: '#F5F3FC',
    100: '#E5DFF6',
    200: '#CBC1EC',
    300: '#A595DA',
    400: '#826DC5',
    500: '#624CA9',
    600: '#4F4082',
    700: '#3C325D',
    800: '#2A243D',
    900: '#1B1726',
  },
}

$base: #684BC8;
$base-ink: #FFFFFF;
$base-50: #F5F3FC;
$base-100: #E5DFF6;
$base-200: #CBC1EC;
$base-300: #A595DA;
$base-400: #826DC5;
$base-500: #624CA9;
$base-600: #4F4082;
$base-700: #3C325D;
$base-800: #2A243D;
$base-900: #1B1726;
$base-hover: #4F34A9;
$base-subtle: #D4CEEA;

{
    "color": {
        "base": {
            "value": "#684BC8",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E5DFF6",
                "type": "color"
            },
            "200": {
                "value": "#CBC1EC",
                "type": "color"
            },
            "300": {
                "value": "#A595DA",
                "type": "color"
            },
            "400": {
                "value": "#826DC5",
                "type": "color"
            },
            "500": {
                "value": "#624CA9",
                "type": "color"
            },
            "600": {
                "value": "#4F4082",
                "type": "color"
            },
            "700": {
                "value": "#3C325D",
                "type": "color"
            },
            "800": {
                "value": "#2A243D",
                "type": "color"
            },
            "900": {
                "value": "#1B1726",
                "type": "color"
            }
        }
    }
}