What color is #577FF9?

#577FF9 is a light, vivid blue. In RGB it is rgb(87, 127, 249), and in HSL hsl(225, 93%, 66%).

Is #577FF9 accessible as text?

On white, #577FF9 has a contrast ratio of 3.62:1 (fails WCAG AA for body text); on black it is 5.81:1 (passes). For text placed on #577FF9, use black for the best readability.

What is the closest Tailwind color to #577FF9?

The nearest Tailwind CSS token is blue-500 (#2B7FFF).

What colors go well with #577FF9?

#577FF9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F9D158. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #577FF9 below.

Is #577FF9 good for buttons?

#577FF9 works well for buttons and highlights, but use black text on #577FF9 — white text only reaches 3.62:1, below the 4.5:1 needed for normal-size labels.

Is #577FF9 the same as CSS dodgerblue?

No — #577FF9 is not the CSS named color dodgerblue, but dodgerblue (#1E90FF) is the closest CSS named color.

#577FF9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #577FF9

Not just a swatch — here's how #577FF9 works with other colors. Named schemes with #577FF9 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #577FF9 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7FA8FF

Signal 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 Signal Blue.

Nordic Calm Accent · 5 colors

Accent #577FF9 Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Signal Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Coastal Morning Lead · 5 colors

Lead #577FF9 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #577FF9 Secondary #A2B4DF Support #9D8F88 Ink #18140F

Signal 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 Signal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #577FF9 Secondary #E86A74 Accent #F79250 Anchor #573B58 Surface #F7E7D7

Signal 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 #577FF9 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 10/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

Low

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 41/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 77/100

High

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

Surface fit 20/100

Very low

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

Print safety 67/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #577FF9

For UI

For branding

For interior

For fashion

People also use #577FF9 with

Powder Blue Medium Slate Blue Saffron Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 5.1:1. Use

Subtle surface Use #E2E8F9 for cards and hover fills. Tint 80

Avoid beside #6558F9 — 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 #577FF9 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: #577FF9;
  --color-base-rgb: 87 127 249;
  --color-base-oklch: oklch(63.1% 0.187 267.2);
  --color-50: #F0F4FE;
  --color-100: #D8E1FD;
  --color-200: #B1C3FC;
  --color-300: #7C9AF4;
  --color-400: #4C73E6;
  --color-500: #2951CC;
  --color-600: #27449B;
  --color-700: #22356D;
  --color-800: #1A2547;
  --color-900: #12182B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  signal-blue: {
    50: '#F0F4FE',
    100: '#D8E1FD',
    200: '#B1C3FC',
    300: '#7C9AF4',
    400: '#4C73E6',
    500: '#2951CC',
    600: '#27449B',
    700: '#22356D',
    800: '#1A2547',
    900: '#12182B',
  },
}

$base: #577FF9;
$base-ink: #141310;
$base-50: #F0F4FE;
$base-100: #D8E1FD;
$base-200: #B1C3FC;
$base-300: #7C9AF4;
$base-400: #4C73E6;
$base-500: #2951CC;
$base-600: #27449B;
$base-700: #22356D;
$base-800: #1A2547;
$base-900: #12182B;
$base-hover: #174FF7;
$base-subtle: #D3DCF7;

{
    "color": {
        "base": {
            "value": "#577FF9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F4FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E1FD",
                "type": "color"
            },
            "200": {
                "value": "#B1C3FC",
                "type": "color"
            },
            "300": {
                "value": "#7C9AF4",
                "type": "color"
            },
            "400": {
                "value": "#4C73E6",
                "type": "color"
            },
            "500": {
                "value": "#2951CC",
                "type": "color"
            },
            "600": {
                "value": "#27449B",
                "type": "color"
            },
            "700": {
                "value": "#22356D",
                "type": "color"
            },
            "800": {
                "value": "#1A2547",
                "type": "color"
            },
            "900": {
                "value": "#12182B",
                "type": "color"
            }
        }
    }
}

Palettes built on #577FF9

Color Lab

Pairs with #577FF9

UI roles & guardrails

In real applications

Scales

Every model

Export