What color is #587EBB?

#587EBB is a medium blue. In RGB it is rgb(88, 126, 187), and in HSL hsl(217, 42%, 54%).

Is #587EBB accessible as text?

On white, #587EBB has a contrast ratio of 4.10:1 (fails WCAG AA for body text); on black it is 5.12:1 (passes). For text placed on #587EBB, use black for the best readability.

What is the closest Tailwind color to #587EBB?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #587EBB?

#587EBB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BB9558. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #587EBB below.

Is #587EBB good for buttons?

#587EBB works well for buttons and highlights, but use black text on #587EBB — white text only reaches 4.10:1, below the 4.5:1 needed for normal-size labels.

Is #587EBB the same as CSS steelblue?

No — #587EBB is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#587EBB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #587EBB

Not just a swatch — here's how #587EBB works with other colors. Named schemes with #587EBB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #587EBB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #587EBB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #7FA3DC

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

Vintage Leather Lead · 5 colors

Lead #587EBB Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Glaucous plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #587EBB Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #587EBB Secondary #9BA9C0 Support #9D8F88 Ink #16140F

Glaucous 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 Glaucous carrying the quiet middle.

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Color Lab

How #587EBB 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 23/100

Cool

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

Softness 49/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 41/100

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 54/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 28/100

Low

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

UI accent fit 89/100

Very high

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

Surface fit 30/100

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 #587EBB

For UI

For branding

For interior

For fashion

People also use #587EBB with

Medium Turquoise Tanzanite Camel 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 4.5:1. Use

Subtle surface Use #E0E6EF for cards and hover fills. Tint 80

Avoid beside #585DBB — 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 #587EBB 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: #587EBB;
  --color-base-rgb: 88 126 187;
  --color-base-oklch: oklch(59.2% 0.103 259.5);
  --color-50: #F4F7FB;
  --color-100: #E2E8F4;
  --color-200: #C5D2E7;
  --color-300: #9CB1D3;
  --color-400: #7691BC;
  --color-500: #55729F;
  --color-600: #475B7B;
  --color-700: #364358;
  --color-800: #262E3B;
  --color-900: #191D24;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F4F7FB',
    100: '#E2E8F4',
    200: '#C5D2E7',
    300: '#9CB1D3',
    400: '#7691BC',
    500: '#55729F',
    600: '#475B7B',
    700: '#364358',
    800: '#262E3B',
    900: '#191D24',
  },
}

$base: #587EBB;
$base-ink: #141310;
$base-50: #F4F7FB;
$base-100: #E2E8F4;
$base-200: #C5D2E7;
$base-300: #9CB1D3;
$base-400: #7691BC;
$base-500: #55729F;
$base-600: #475B7B;
$base-700: #364358;
$base-800: #262E3B;
$base-900: #191D24;
$base-hover: #40639C;
$base-subtle: #D1D9E7;

{
    "color": {
        "base": {
            "value": "#587EBB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E8F4",
                "type": "color"
            },
            "200": {
                "value": "#C5D2E7",
                "type": "color"
            },
            "300": {
                "value": "#9CB1D3",
                "type": "color"
            },
            "400": {
                "value": "#7691BC",
                "type": "color"
            },
            "500": {
                "value": "#55729F",
                "type": "color"
            },
            "600": {
                "value": "#475B7B",
                "type": "color"
            },
            "700": {
                "value": "#364358",
                "type": "color"
            },
            "800": {
                "value": "#262E3B",
                "type": "color"
            },
            "900": {
                "value": "#191D24",
                "type": "color"
            }
        }
    }
}

Palettes built on #587EBB

Color Lab

Pairs with #587EBB

UI roles & guardrails

In real applications

Scales

Every model

Export