What color is #688BC3?

#688BC3 is a medium blue. In RGB it is rgb(104, 139, 195), and in HSL hsl(217, 43%, 59%).

Is #688BC3 accessible as text?

On white, #688BC3 has a contrast ratio of 3.46:1 (fails WCAG AA for body text); on black it is 6.07:1 (passes). For text placed on #688BC3, use black for the best readability.

What is the closest Tailwind color to #688BC3?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #688BC3?

#688BC3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C3A169. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #688BC3 below.

Is #688BC3 good for buttons?

#688BC3 works well for buttons and highlights, but use black text on #688BC3 — white text only reaches 3.46:1, below the 4.5:1 needed for normal-size labels.

Is #688BC3 the same as CSS steelblue?

No — #688BC3 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#688BC3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #688BC3

Not just a swatch — here's how #688BC3 works with other colors. Named schemes with #688BC3 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #688BC3 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.

Nordic Calm Accent · 5 colors

Accent #688BC3 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Glaucous 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 #688BC3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #8FB0E5

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #688BC3 Secondary #A9B6CB 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.

Modern Café Dominant · 5 colors

Dominant #688BC3 Anchor #3B2924 Surface #F3E1D2 Accent #789E79 Secondary #393933

Glaucous anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Build a working theme in the generator →

Color Lab

How #688BC3 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 26/100

Cool

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

Softness 54/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

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 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 36/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 76/100

High

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

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #688BC3

For UI

For branding

For interior

For fashion

People also use #688BC3 with

Sky Blue Very Peri 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 5.4:1. Use

Subtle surface Use #E4E9F1 for cards and hover fills. Tint 80

Avoid beside #696EC3 — 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 #688BC3 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: #688BC3;
  --color-base-rgb: 104 139 195;
  --color-base-oklch: oklch(63.4% 0.094 259.5);
  --color-50: #F4F7FB;
  --color-100: #E1E8F4;
  --color-200: #C5D2E8;
  --color-300: #9CB1D3;
  --color-400: #7591BD;
  --color-500: #5572A0;
  --color-600: #465B7C;
  --color-700: #364359;
  --color-800: #262E3B;
  --color-900: #191D24;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F4F7FB',
    100: '#E1E8F4',
    200: '#C5D2E8',
    300: '#9CB1D3',
    400: '#7591BD',
    500: '#5572A0',
    600: '#465B7C',
    700: '#364359',
    800: '#262E3B',
    900: '#191D24',
  },
}

$base: #688BC3;
$base-ink: #141310;
$base-50: #F4F7FB;
$base-100: #E1E8F4;
$base-200: #C5D2E8;
$base-300: #9CB1D3;
$base-400: #7591BD;
$base-500: #5572A0;
$base-600: #465B7C;
$base-700: #364359;
$base-800: #262E3B;
$base-900: #191D24;
$base-hover: #456CAC;
$base-subtle: #D5DDEA;

{
    "color": {
        "base": {
            "value": "#688BC3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E8F4",
                "type": "color"
            },
            "200": {
                "value": "#C5D2E8",
                "type": "color"
            },
            "300": {
                "value": "#9CB1D3",
                "type": "color"
            },
            "400": {
                "value": "#7591BD",
                "type": "color"
            },
            "500": {
                "value": "#5572A0",
                "type": "color"
            },
            "600": {
                "value": "#465B7C",
                "type": "color"
            },
            "700": {
                "value": "#364359",
                "type": "color"
            },
            "800": {
                "value": "#262E3B",
                "type": "color"
            },
            "900": {
                "value": "#191D24",
                "type": "color"
            }
        }
    }
}

Palettes built on #688BC3

Color Lab

Pairs with #688BC3

UI roles & guardrails

In real applications

Scales

Every model

Export