What color is #515B90?

#515B90 is a medium, muted blue-violet. In RGB it is rgb(81, 91, 144), and in HSL hsl(230, 28%, 44%).

Is #515B90 accessible as text?

On white, #515B90 has a contrast ratio of 6.46:1 (passes WCAG AA for body text); on black it is 3.25:1 (fails). For text placed on #515B90, use white for the best readability.

What is the closest Tailwind color to #515B90?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #515B90?

#515B90 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #908551. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #515B90 below.

Is #515B90 good for buttons?

#515B90 works well for buttons and highlights, but use white text on #515B90 — black text only reaches 3.25:1, below the 4.5:1 needed for normal-size labels.

Is #515B90 the same as CSS darkslateblue?

No — #515B90 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#515B90 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #515B90

Not just a swatch — here's how #515B90 works with other colors. Named schemes with #515B90 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #515B90 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Ultra Violet 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 #515B90 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

Ultra Violet 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 #515B90 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #747FB1

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

Vintage Leather Lead · 5 colors

Lead #515B90 Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Ultra Violet 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 #515B90 Secondary #82879B Support #9D9088 Ink #18140F

Ultra Violet 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 Ultra Violet carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #515B90 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 32/100

Cool

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

Softness 43/100

Moderate

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 59/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 57/100

Moderate

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

Brand distinctiveness 23/100

Low

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

UI accent fit 86/100

Very high

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

Surface fit 27/100

Low

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

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #515B90

For UI

For branding

For interior

For fashion

People also use #515B90 with

Cadet Blue Ultra Violet Shadow Gainsboro Gunmetal Gray

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 6.5:1. Use

Subtle surface Use #DDDFE8 for cards and hover fills. Tint 80

Avoid beside #5B5190 — 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 #515B90 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: #515B90;
  --color-base-rgb: 81 91 144;
  --color-base-oklch: oklch(48.7% 0.086 274.6);
  --color-50: #F5F6FA;
  --color-100: #E5E7F1;
  --color-200: #CBCFE2;
  --color-300: #A6ACCA;
  --color-400: #828AB0;
  --color-500: #626A93;
  --color-600: #4F5572;
  --color-700: #3C4053;
  --color-800: #2A2C37;
  --color-900: #1B1C22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultra-violet: {
    50: '#F5F6FA',
    100: '#E5E7F1',
    200: '#CBCFE2',
    300: '#A6ACCA',
    400: '#828AB0',
    500: '#626A93',
    600: '#4F5572',
    700: '#3C4053',
    800: '#2A2C37',
    900: '#1B1C22',
  },
}

$base: #515B90;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E5E7F1;
$base-200: #CBCFE2;
$base-300: #A6ACCA;
$base-400: #828AB0;
$base-500: #626A93;
$base-600: #4F5572;
$base-700: #3C4053;
$base-800: #2A2C37;
$base-900: #1B1C22;
$base-hover: #414973;
$base-subtle: #CBCEDD;

{
    "color": {
        "base": {
            "value": "#515B90",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E5E7F1",
                "type": "color"
            },
            "200": {
                "value": "#CBCFE2",
                "type": "color"
            },
            "300": {
                "value": "#A6ACCA",
                "type": "color"
            },
            "400": {
                "value": "#828AB0",
                "type": "color"
            },
            "500": {
                "value": "#626A93",
                "type": "color"
            },
            "600": {
                "value": "#4F5572",
                "type": "color"
            },
            "700": {
                "value": "#3C4053",
                "type": "color"
            },
            "800": {
                "value": "#2A2C37",
                "type": "color"
            },
            "900": {
                "value": "#1B1C22",
                "type": "color"
            }
        }
    }
}

Palettes built on #515B90

Color Lab

Pairs with #515B90

UI roles & guardrails

In real applications

Scales

Every model

Export