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blue · cool

#586278

a dark, soft blue · cool · closest name: Dim Gray

Token name suggestion: Dusk Denim

RGB
88, 98, 120
HSL
221°, 15%, 41%
CMYK
27, 18, 0, 53
Luminance
0.1217

#586278 is a dark soft blue, 221° on the wheel and 69/100 on the cool side. Put white text on it (6.12:1). As text it scores 6.12:1 on white — safe at any size. Nearest name is Dim Gray, nearest Tailwind family is slate.

hsl(221 15% 41%)rgb(88 98 120)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #586278 is made of, how bright it looks, and which way it leans.

Hex
#586278
Hue
221°
blue
Saturation
15%
soft
Lightness
41%
dark
Brightness
47%
HSV value
Perceived
38%
weighted brightness
Luminance
0.1217
WCAG relative
Temperature
Cool
69/100 cool
Color family
Blue
Tone
Soft
Best ink
White
6.12:1
Closest name
Dim Gray
ΔE2000 10.9
Chroma
13.7
LCH, 0–130ish
OKLCH L
0.496
perceptual lightness
Tailwind
slate
500 · ΔE 7
Web-safe
#666666
nearest of 216
Where it sits
Hue221° of 360°
Saturation15%
Lightness41%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #586278.

Temperature
Warm ← → Cool69% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red17%
Green72%
Blue11%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#586278
HEX (8-digit)#586278ff
RGBrgb(88, 98, 120)
RGBArgba(88, 98, 120, 1)
HSLhsl(221, 15%, 41%)
HSV / HSBhsv(221, 27%, 47%)
HWBhwb(221 35% 53%)
CMYKcmyk(27%, 18%, 0%, 53%)
LABlab(41.5 1.6 -13.6)
LCHlch(41.5 13.7 276.5)
OKLCHoklch(0.496 0.037 265.8)
XYZ (D65)xyz(11.78, 12.17, 19.49)
Decimal5792376
Display P3color(display-p3 0.345 0.384 0.471)
Web-safe#666666

Copy-ready code

every platformclick to select
/* CSS */
color: #586278;
background-color: #586278;
/* CSS custom property */
--brand: #586278;
/* Tailwind (arbitrary) */
class="text-[#586278] bg-[#586278]"
/* SCSS */
$brand: #586278;
/* SwiftUI */
Color(red: 0.345, green: 0.384, blue: 0.471)
/* UIKit */
UIColor(red: 0.345, green: 0.384, blue: 0.471, alpha: 1)
/* Android XML */
<color name="brand">#586278</color>
/* Android Compose */
Color(0xFF586278)
/* Flutter */
Color(0xFF586278)
/* Python / OpenCV (BGR) */
(120, 98, 88)
/* Python / PIL (RGB) */
(88, 98, 120)
/* Java AWT */
new Color(88, 98, 120)
/* .NET */
Color.FromArgb(255, 88, 98, 120)
/* OpenGL / Unity (0–1) */
(0.3451f, 0.3843f, 0.4706f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{88,98,120}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #586278 85%, white);
border-color: color-mix(in oklab, #586278 40%, transparent);
/* theme-aware in one line */
color: light-dark(#363C4A, #DCDFE5);
/* relative colour syntax */
--hover: hsl(from #586278 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F6F7F8;
  --brand-100: #EEEFF2;
  --brand-200: #D9DCE2;
  --brand-300: #BEC4D0;
  --brand-400: #9EA6B8;
  --brand-500: #7E88A0;
  --brand-600: #68738D;
  --brand-700: #586278;
  --brand-800: #454D5E;
  --brand-900: #353A46;
  --brand-950: #21242C;
  --brand: #586278;
  --brand-ink: #ffffff;
  --brand-surface: #F6F7F9;
  --brand-border: #D0D4DC;
  --brand-hover: #495163;
  --brand-pressed: #3A404F;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #181A20;
    --brand-ink: #DCDFE5;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F6F7F8',
        100: '#EEEFF2',
        200: '#D9DCE2',
        300: '#BEC4D0',
        400: '#9EA6B8',
        500: '#7E88A0',
        600: '#68738D',
        700: '#586278',
        800: '#454D5E',
        900: '#353A46',
        950: '#21242C',
        DEFAULT: '#586278',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F6F7F8,
  '100': #EEEFF2,
  '200': #D9DCE2,
  '300': #BEC4D0,
  '400': #9EA6B8,
  '500': #7E88A0,
  '600': #68738D,
  '700': #586278,
  '800': #454D5E,
  '900': #353A46,
  '950': #21242C,
);
$brand-base: #586278;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F6F7F8", "$type": "color" },
      "100": { "$value": "#EEEFF2", "$type": "color" },
      "200": { "$value": "#D9DCE2", "$type": "color" },
      "300": { "$value": "#BEC4D0", "$type": "color" },
      "400": { "$value": "#9EA6B8", "$type": "color" },
      "500": { "$value": "#7E88A0", "$type": "color" },
      "600": { "$value": "#68738D", "$type": "color" },
      "700": { "$value": "#586278", "$type": "color" },
      "800": { "$value": "#454D5E", "$type": "color" },
      "900": { "$value": "#353A46", "$type": "color" },
      "950": { "$value": "#21242C", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #586278 · 6.12:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.12:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.43:1
AA fail · AA large pass · AAA fail
Reading the other direction: #586278 as text scores 6.12:1 on white and 3.43:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F0F2F4 at 5.45:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#586278 · 6.12:1
AA on whitealready passes
#586278
The quick fox
#4F586C · 7.13:1
AAA on white−4% L
#4F586C
The quick fox
#697590 · 4.55:1
AA on black+8% L
#697590
The quick fox
#8F98AD · 7.26:1
AAA on black+21% L
#8F98AD

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #586278 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#586278 on white: 6.12:1
AA ✓ pass · AA-large · AAA
Aa
#586278 on black: 3.43:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #586278 as text on that neutral, and that neutral as text on #586278.

NeutralRatioBoth directions
White6.12:1AaAa
Slate 505.85:1AaAa
Slate 1005.58:1AaAa
Slate 2004.96:1AaAa
Slate 3004.12:1AaAa
Slate 4002.39:1AaAa
Slate 5001.29:1AaAa
Slate 6001.24:1AaAa
Slate 7001.69:1AaAa
Slate 8002.39:1AaAa
Slate 9002.92:1AaAa
Black3.43:1AaAa
Colour vision deficiency
true color
protanopia · #5B6379
deuteranopia · #586177
tritanopia · #506669

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #586278 is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F6F7F8
#EEEFF2
#D9DCE2
#BEC4D0
#9EA6B8
#7E88A0
#68738D
#586278
#454D5E
#353A46
#21242C
Base = 700Lightest = 50 · #F6F7F8Darkest = 950 · #21242CText step on white = 600
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.009 265.8);
  --brand-100: oklch(0.94 0.015 265.8);
  --brand-200: oklch(0.88 0.022 265.8);
  --brand-300: oklch(0.80 0.029 265.8);
  --brand-400: oklch(0.72 0.034 265.8);
  --brand-500: oklch(0.64 0.037 265.8);
  --brand-600: oklch(0.56 0.037 265.8);
  --brand-700: oklch(0.48 0.035 265.8);
  --brand-800: oklch(0.40 0.031 265.8);
  --brand-900: oklch(0.32 0.026 265.8);
  --brand-950: oklch(0.24 0.021 265.8);
}

Colors that work with #586278

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F6F7F9
Tinted page background
Border#D0D4DC
Hairlines and dividers
Muted text#616C84
Captions on the surface
Accent#7C6654
Second voice, not a rival
Dark variant#363C4A
Hover, pressed, headers
Light variant#F0F2F4
Selected rows, tints
Dark surface#181A20
Dark-mode background
Hover#495163
One step down in lightness
Pressed#3A404F
Two steps down
Disabled#929BAF
Chroma pulled out
Focus ring#55678F
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #586278

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Charts, tags and secondary surfaces
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Black text placed on it
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. The low lightness adds weight and formality.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityHigh
  • EnergyMedium
  • Weight59/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#786E58
Analogous left#587278
Analogous right#5E5878
Split-complement 1#785E58
Split-complement 2#727858
Triadic 1#785862
Triadic 2#627858
Tetradic#785872
On the wheel
Base+30°−30°+120°+240°+180°221°

#586278 sits at 221°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red34.5%
Green38.4%
Blue47.1%
R · 0–255
88
0x58
G · 0–255
98
0x62
B · 0–255
120
0x78

CMYK percentages

Cyan26.7%
Magenta18.3%
Yellow0.0%
Key (black)52.9%

Total ink coverage is 98%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#586278 text on a black background

contrast 3.43:1

Card sample

#586278 text on a white background

contrast 6.12:1

Card sample

#586278 on grey

5.58:1

#586278 on its own surface

5.71:1

#586278 on its dark surface

2.84:1

CSS3 live lab

Text font color

The quick brown fox

color: #586278;
Background color
Panel with #586278 background
background-color: #586278;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #586278;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(88, 98, 120, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(88, 98, 120, 0.45);
Border & gradient
Gradient panel
border: 3px solid #586278;
background: linear-gradient(135deg, #586278, #635878);
Gradient text

Gradient headline

background: linear-gradient(90deg, #586278, #6B5878);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #586278;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #586278;
caret-color: #586278;
Left rule
Pull quote or callout
border-left: 4px solid #586278;
Ring + tint
Selected chip
background: #F0F2F4;
box-shadow: inset 0 0 0 2px #586278;
Conic badge
68%
background: conic-gradient(#586278 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #586278 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(88, 98, 120, 0.5)
rgb(88 98 120 / 50%)
#58627880
hsl(221 15% 41% / 50%)
color-mix(in srgb, #586278 50%, transparent)
Alpha8-digit hexFlat on white
10%#5862781a#EEEFF2
20%#58627833#DEE0E4
40%#58627866#BCC0C9
60%#58627899#9BA1AE
80%#586278cc#798193

Gradients from #586278

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #748099, #586278 45%, #363C4A);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #586278, #574B66);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #586278, #786E58);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #8690A6 0%, #586278 45%, #363C4A 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F7F9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #6E9195 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #6F658A 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #363C4A 0%, transparent 65%), #586278;

Monochromatic scale

Palettes built from #586278

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#586278 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 3.43:1 — lift it to #697590 for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#586278, answered

What color is #586278?

#586278 is a dark soft blue, closest to Dim Gray (ΔE2000 10.9). It sits at 221° on the hue wheel with 15% saturation and 41% lightness, which reads as cool.

What is the RGB value of #586278?

rgb(88, 98, 120) — 88 red, 98 green and 120 blue out of 255, or 34.5% / 38.4% / 47.1% by channel.

What is #586278 in HSL and HSV?

hsl(221, 15%, 41%) and hsv(221, 27%, 47%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #586278 a light or a dark color?

It is a dark color. Relative luminance is 0.1217 and perceived brightness is 38%, so white text on it reaches 6.12:1.

Should I use black or white text on #586278?

White. It scores 6.12:1 against #586278, versus 3.43:1 for black — AA at any size.

Is #586278 accessible on a white background?

#586278 on white scores 6.12:1, which clears AA at every size but not AAA.

What is the complementary color of #586278?

#786E58 sits directly opposite on the wheel. Softer options are the split-complements #785E58 and #727858, which give the same contrast with far less vibration.

What colors go well with #586278?

For interface work: #F6F7F9 as the surface, #D0D4DC for borders, #616C84 for secondary text, #7C6654 as an accent and #363C4A for hover and pressed states. For a palette, the analogous pair #587278 and #5E5878 stays calm, while #786E58 is the loudest partner.

What is #586278 in CMYK for printing?

cmyk(27%, 18%, 0%, 53%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #586278 warm or cool?

Cool — it scores 69 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #5A5878; nudged cooler, #56667A.

Which Tailwind color is closest to #586278?

The slate family — its 500 step is #64748b, ΔE2000 7 away. That is a visible difference, so define #586278 as a custom token rather than reaching for the built-in.

How do I use #586278 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#586278] or text-[#586278], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #586278 with 50% opacity?

rgba(88, 98, 120, 0.5), or #58627880 in eight-digit hex. Over white that composites to #ACB1BC; over black, #2C313C.

Is #586278 a web-safe color?

No. The nearest web-safe colour is #666666, ΔE2000 10.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #586278 mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this moderate chroma the association is present but not shouted.

What gradient works with #586278?

The safest is same-hue elevation: linear-gradient(135deg, #748099, #586278 45%, #363C4A). For more colour, a short hue run to #574B66 keeps it rich without turning muddy.

Work with #586278 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #586278 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.