What color is #6151CF?

#6151CF is a medium indigo. In RGB it is rgb(97, 81, 207), and in HSL hsl(248, 57%, 56%).

Is #6151CF accessible as text?

On white, #6151CF has a contrast ratio of 5.86:1 (passes WCAG AA for body text); on black it is 3.59:1 (fails). For text placed on #6151CF, use white for the best readability.

What is the closest Tailwind color to #6151CF?

The nearest Tailwind CSS token is indigo-500 (#615FFF).

What colors go well with #6151CF?

#6151CF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BECF4F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #6151CF below.

Is #6151CF good for buttons?

#6151CF works well for buttons and highlights, but use white text on #6151CF — black text only reaches 3.59:1, below the 4.5:1 needed for normal-size labels.

Is #6151CF the same as CSS slateblue?

No — #6151CF is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#6151CF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #6151CF

Not just a swatch — here's how #6151CF works with other colors. Named schemes with #6151CF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #6151CF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #827BEE

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 #6151CF Surface #F5E5D7 Anchor #5B2142 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 #6151CF Secondary #8D8EBA 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 #6151CF Accent #A5C4C3 Surface #EAD5BF 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 #6151CF Secondary #E86A70 Accent #F5934C 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 #6151CF 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 20/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 51/100

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 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 72/100

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 10/100

Very low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #6151CF

For UI

For branding

For interior

For fashion

People also use #6151CF with

Carolina Blue Medium Orchid Yellow Green Gainsboro Prussian Blue

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 5.9:1. Use

Subtle surface Use #E2DFF2 for cards and hover fills. Tint 80

Avoid beside #8B4FCF — 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 #6151CF 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: #6151CF;
  --color-base-rgb: 97 81 207;
  --color-base-oklch: oklch(52.2% 0.187 283.6);
  --color-50: #F4F3FC;
  --color-100: #E2DEF7;
  --color-200: #C5BFED;
  --color-300: #9D93DC;
  --color-400: #766AC8;
  --color-500: #5648AD;
  --color-600: #473D84;
  --color-700: #37305E;
  --color-800: #26233E;
  --color-900: #191726;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  slate-blue: {
    50: '#F4F3FC',
    100: '#E2DEF7',
    200: '#C5BFED',
    300: '#9D93DC',
    400: '#766AC8',
    500: '#5648AD',
    600: '#473D84',
    700: '#37305E',
    800: '#26233E',
    900: '#191726',
  },
}

$base: #6151CF;
$base-ink: #FFFFFF;
$base-50: #F4F3FC;
$base-100: #E2DEF7;
$base-200: #C5BFED;
$base-300: #9D93DC;
$base-400: #766AC8;
$base-500: #5648AD;
$base-600: #473D84;
$base-700: #37305E;
$base-800: #26233E;
$base-900: #191726;
$base-hover: #4231B3;
$base-subtle: #D3CFEC;

{
    "color": {
        "base": {
            "value": "#6151CF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FC",
                "type": "color"
            },
            "100": {
                "value": "#E2DEF7",
                "type": "color"
            },
            "200": {
                "value": "#C5BFED",
                "type": "color"
            },
            "300": {
                "value": "#9D93DC",
                "type": "color"
            },
            "400": {
                "value": "#766AC8",
                "type": "color"
            },
            "500": {
                "value": "#5648AD",
                "type": "color"
            },
            "600": {
                "value": "#473D84",
                "type": "color"
            },
            "700": {
                "value": "#37305E",
                "type": "color"
            },
            "800": {
                "value": "#26233E",
                "type": "color"
            },
            "900": {
                "value": "#191726",
                "type": "color"
            }
        }
    }
}