What color is #377FBD?

#377FBD is a medium blue. In RGB it is rgb(55, 127, 189), and in HSL hsl(208, 55%, 48%).

Is #377FBD accessible as text?

On white, #377FBD has a contrast ratio of 4.26:1 (fails WCAG AA for body text); on black it is 4.93:1 (passes). For text placed on #377FBD, use black for the best readability.

What is the closest Tailwind color to #377FBD?

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

What colors go well with #377FBD?

#377FBD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BE7637. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #377FBD below.

Is #377FBD good for buttons?

#377FBD works well for buttons and highlights, but use black text on #377FBD — white text only reaches 4.26:1, below the 4.5:1 needed for normal-size labels.

Is #377FBD the same as CSS steelblue?

No — #377FBD is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#377FBD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #377FBD

Not just a swatch — here's how #377FBD works with other colors. Named schemes with #377FBD in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #377FBD Accent #A5C4C0 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Steel Blue 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 #377FBD Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #65A4DE

Steel 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 Steel Blue.

Vintage Leather Lead · 5 colors

Lead #377FBD Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233B

Steel Blue 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 #377FBD Surface #EDE9D6 Anchor #5A2245 Accent #E4C2CB Secondary #322B2F

Steel Blue 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 #377FBD Secondary #90A8BE Support #969386 Ink #16140F

Steel 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 Steel Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #377FBD 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 16/100

Cool

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

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 42/100

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 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 32/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 94/100

Very high

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

Surface fit 24/100

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 #377FBD

For UI

For branding

For interior

For fashion

People also use #377FBD with

Medium Turquoise Cerulean Copper Gainsboro Charcoal

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

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 4.4:1. Use

Subtle surface Use #DAE5EF for cards and hover fills. Tint 80

Avoid beside #3752BE — 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 #377FBD 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: #377FBD;
  --color-base-rgb: 55 127 189;
  --color-base-oklch: oklch(58.0% 0.119 247.6);
  --color-50: #F3F8FC;
  --color-100: #DFEBF6;
  --color-200: #C0D8ED;
  --color-300: #94BADB;
  --color-400: #6B9CC7;
  --color-500: #4A7EAB;
  --color-600: #3F6383;
  --color-700: #31495E;
  --color-800: #23313E;
  --color-900: #171F26;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F3F8FC',
    100: '#DFEBF6',
    200: '#C0D8ED',
    300: '#94BADB',
    400: '#6B9CC7',
    500: '#4A7EAB',
    600: '#3F6383',
    700: '#31495E',
    800: '#23313E',
    900: '#171F26',
  },
}

$base: #377FBD;
$base-ink: #141310;
$base-50: #F3F8FC;
$base-100: #DFEBF6;
$base-200: #C0D8ED;
$base-300: #94BADB;
$base-400: #6B9CC7;
$base-500: #4A7EAB;
$base-600: #3F6383;
$base-700: #31495E;
$base-800: #23313E;
$base-900: #171F26;
$base-hover: #2C6698;
$base-subtle: #C7D8E8;

{
    "color": {
        "base": {
            "value": "#377FBD",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DFEBF6",
                "type": "color"
            },
            "200": {
                "value": "#C0D8ED",
                "type": "color"
            },
            "300": {
                "value": "#94BADB",
                "type": "color"
            },
            "400": {
                "value": "#6B9CC7",
                "type": "color"
            },
            "500": {
                "value": "#4A7EAB",
                "type": "color"
            },
            "600": {
                "value": "#3F6383",
                "type": "color"
            },
            "700": {
                "value": "#31495E",
                "type": "color"
            },
            "800": {
                "value": "#23313E",
                "type": "color"
            },
            "900": {
                "value": "#171F26",
                "type": "color"
            }
        }
    }
}

Palettes built on #377FBD

Color Lab

Pairs with #377FBD

UI roles & guardrails

In real applications

Scales

Every model

Export