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blue · cool

#595387

a dark, soft blue · cool · closest name: Dark Slate Blue

Token name suggestion: Slate Sapphire

RGB
89, 83, 135
HSL
247°, 24%, 43%
CMYK
34, 39, 0, 47
Luminance
0.1006

#595387 is a dark soft blue, 247° on the wheel and 70/100 on the cool side. Put white text on it (6.97:1). As text it scores 6.97:1 on white — safe at any size. Nearest name is Dark Slate Blue, nearest Tailwind family is slate.

hsl(247 24% 43%)rgb(89 83 135)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #595387 is made of, how bright it looks, and which way it leans.

Hex
#595387
Hue
247°
blue
Saturation
24%
soft
Lightness
43%
dark
Brightness
53%
HSV value
Perceived
36%
weighted brightness
Luminance
0.1006
WCAG relative
Temperature
Cool
70/100 cool
Color family
Blue
Tone
Soft
Best ink
White
6.97:1
Closest name
Dark Slate Blue
ΔE2000 8.2
Chroma
32.1
LCH, 0–130ish
OKLCH L
0.471
perceptual lightness
Tailwind
slate
500 · ΔE 14.2
Web-safe
#666699
nearest of 216
Where it sits
Hue247° of 360°
Saturation24%
Lightness43%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #595387.

Temperature
Warm ← → Cool70% 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
Red21%
Green61%
Blue17%

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

Every format

HEX#595387
HEX (8-digit)#595387ff
RGBrgb(89, 83, 135)
RGBArgba(89, 83, 135, 1)
HSLhsl(247, 24%, 43%)
HSV / HSBhsv(247, 39%, 53%)
HWBhwb(247 33% 47%)
CMYKcmyk(34%, 39%, 0%, 47%)
LABlab(38.0 15.4 -28.2)
LCHlch(38.0 32.1 298.6)
OKLCHoklch(0.471 0.083 288.1)
XYZ (D65)xyz(11.59, 10.06, 24.25)
Decimal5854087
Display P3color(display-p3 0.349 0.325 0.529)
Web-safe#666699

Copy-ready code

every platformclick to select
/* CSS */
color: #595387;
background-color: #595387;
/* CSS custom property */
--brand: #595387;
/* Tailwind (arbitrary) */
class="text-[#595387] bg-[#595387]"
/* SCSS */
$brand: #595387;
/* SwiftUI */
Color(red: 0.349, green: 0.325, blue: 0.529)
/* UIKit */
UIColor(red: 0.349, green: 0.325, blue: 0.529, alpha: 1)
/* Android XML */
<color name="brand">#595387</color>
/* Android Compose */
Color(0xFF595387)
/* Flutter */
Color(0xFF595387)
/* Python / OpenCV (BGR) */
(135, 83, 89)
/* Python / PIL (RGB) */
(89, 83, 135)
/* Java AWT */
new Color(89, 83, 135)
/* .NET */
Color.FromArgb(255, 89, 83, 135)
/* OpenGL / Unity (0–1) */
(0.3490f, 0.3255f, 0.5294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{89,83,135}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #595387 85%, white);
border-color: color-mix(in oklab, #595387 40%, transparent);
/* theme-aware in one line */
color: light-dark(#34314F, #DBD9E8);
/* relative colour syntax */
--hover: hsl(from #595387 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: #F6F6F9;
  --brand-100: #EEEDF3;
  --brand-200: #D8D7E5;
  --brand-300: #BDB9D4;
  --brand-400: #9B97BF;
  --brand-500: #7A74AA;
  --brand-600: #645D98;
  --brand-700: #595387;
  --brand-800: #433E65;
  --brand-900: #33304B;
  --brand-950: #201E2F;
  --brand: #595387;
  --brand-ink: #ffffff;
  --brand-surface: #F6F6F9;
  --brand-border: #CFCCE0;
  --brand-hover: #4A4571;
  --brand-pressed: #3C385B;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #171523;
    --brand-ink: #DBD9E8;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F6F6F9',
        100: '#EEEDF3',
        200: '#D8D7E5',
        300: '#BDB9D4',
        400: '#9B97BF',
        500: '#7A74AA',
        600: '#645D98',
        700: '#595387',
        800: '#433E65',
        900: '#33304B',
        950: '#201E2F',
        DEFAULT: '#595387',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F6F6F9,
  '100': #EEEDF3,
  '200': #D8D7E5,
  '300': #BDB9D4,
  '400': #9B97BF,
  '500': #7A74AA,
  '600': #645D98,
  '700': #595387,
  '800': #433E65,
  '900': #33304B,
  '950': #201E2F,
);
$brand-base: #595387;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F6F6F9", "$type": "color" },
      "100": { "$value": "#EEEDF3", "$type": "color" },
      "200": { "$value": "#D8D7E5", "$type": "color" },
      "300": { "$value": "#BDB9D4", "$type": "color" },
      "400": { "$value": "#9B97BF", "$type": "color" },
      "500": { "$value": "#7A74AA", "$type": "color" },
      "600": { "$value": "#645D98", "$type": "color" },
      "700": { "$value": "#595387", "$type": "color" },
      "800": { "$value": "#433E65", "$type": "color" },
      "900": { "$value": "#33304B", "$type": "color" },
      "950": { "$value": "#201E2F", "$type": "color" }
    },
    "brandInk": { "$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 #595387 · 6.97:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.97:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.01:1
AA fail · AA large pass · AAA fail
Reading the other direction: #595387 as text scores 6.97:1 on white and 3.01:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F0EFF5 at 6.10:1.

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
#595387 · 6.97:1
AA on whitealready passes
#595387
The quick fox
#575184 · 7.20:1
AAA on white−1% L
#575184
The quick fox
#7670A7 · 4.65:1
AA on black+12% L
#7670A7
The quick fox
#9793BC · 7.22:1
AAA on black+23% L
#9793BC

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #595387 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
#595387 on white: 6.97:1
AA ✓ pass · AA-large · AAA
Aa
#595387 on black: 3.01:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #595387 as text on that neutral, and that neutral as text on #595387.

NeutralRatioBoth directions
White6.97:1AaAa
Slate 506.66:1AaAa
Slate 1006.36:1AaAa
Slate 2005.66:1AaAa
Slate 3004.70:1AaAa
Slate 4002.72:1AaAa
Slate 5001.47:1AaAa
Slate 6001.09:1AaAa
Slate 7001.49:1AaAa
Slate 8002.10:1AaAa
Slate 9002.56:1AaAa
Black3.01:1AaAa
Colour vision deficiency
true color
protanopia · #435B89
deuteranopia · #435886
tritanopia · #4E5D66

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. #595387 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.

#F6F6F9
#EEEDF3
#D8D7E5
#BDB9D4
#9B97BF
#7A74AA
#645D98
#595387
#433E65
#33304B
#201E2F
Base = 700Lightest = 50 · #F6F6F9Darkest = 950 · #201E2FText 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 0.021 288.1);
  --brand-100: oklch(0.94 0.033 288.1);
  --brand-200: oklch(0.88 0.050 288.1);
  --brand-300: oklch(0.80 0.065 288.1);
  --brand-400: oklch(0.72 0.076 288.1);
  --brand-500: oklch(0.64 0.083 288.1);
  --brand-600: oklch(0.56 0.083 288.1);
  --brand-700: oklch(0.48 0.078 288.1);
  --brand-800: oklch(0.40 0.070 288.1);
  --brand-900: oklch(0.32 0.058 288.1);
  --brand-950: oklch(0.24 0.046 288.1);
}

Colors that work with #595387

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#F6F6F9
Tinted page background
Border#CFCCE0
Hairlines and dividers
Muted text#5E578E
Captions on the surface
Accent#8B834F
Second voice, not a rival
Dark variant#34314F
Hover, pressed, headers
Light variant#F0EFF5
Selected rows, tints
Dark surface#171523
Dark-mode background
Hover#4A4571
One step down in lightness
Pressed#3C385B
Two steps down
Disabled#9691B9
Chroma pulled out
Focus ring#584F9F
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 #595387

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
  • Weight57/100
  • 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#818753
Analogous left#536787
Analogous right#735387
Split-complement 1#877353
Split-complement 2#678753
Triadic 1#875953
Triadic 2#538759
Tetradic#875367
On the wheel
Base+30°−30°+120°+240°+180°247°

#595387 sits at 247°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red34.9%
Green32.5%
Blue52.9%
R · 0–255
89
0x59
G · 0–255
83
0x53
B · 0–255
135
0x87

CMYK percentages

Cyan34.1%
Magenta38.5%
Yellow0.0%
Key (black)47.1%

Total ink coverage is 120%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#595387 text on a black background

contrast 3.01:1

Card sample

#595387 text on a white background

contrast 6.97:1

Card sample

#595387 on grey

6.36:1

#595387 on its own surface

6.46:1

#595387 on its dark surface

2.58:1

CSS3 live lab

Text font color

The quick brown fox

color: #595387;
Background color
Panel with #595387 background
background-color: #595387;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #595387;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(89, 83, 135, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(89, 83, 135, 0.45);
Border & gradient
Gradient panel
border: 3px solid #595387;
background: linear-gradient(135deg, #595387, #7C5387);
Gradient text

Gradient headline

background: linear-gradient(90deg, #595387, #875385);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #595387;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #595387;
caret-color: #595387;
Left rule
Pull quote or callout
border-left: 4px solid #595387;
Ring + tint
Selected chip
background: #F0EFF5;
box-shadow: inset 0 0 0 2px #595387;
Conic badge
68%
background: conic-gradient(#595387 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #595387 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(89, 83, 135, 0.5)
rgb(89 83 135 / 50%)
#59538780
hsl(247 24% 43% / 50%)
color-mix(in srgb, #595387 50%, transparent)
Alpha8-digit hexFlat on white
10%#5953871a#EEEEF3
20%#59538733#DEDDE7
40%#59538766#BDBACF
60%#59538799#9B98B7
80%#595387cc#7A759F

Gradients from #595387

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, #7670A7, #595387 45%, #34314F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #595387, #6E4774);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #595387, #818753);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #8883B3 0%, #595387 45%, #34314F 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F6F9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #6A85A3 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #885F9A 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #34314F 0%, transparent 65%), #595387;

Monochromatic scale

Palettes built from #595387

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.

#595387 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 3.01:1 — lift it to #7670A7 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.

#595387, answered

What color is #595387?

#595387 is a dark soft blue, closest to Dark Slate Blue (ΔE2000 8.2). It sits at 247° on the hue wheel with 24% saturation and 43% lightness, which reads as cool.

What is the RGB value of #595387?

rgb(89, 83, 135) — 89 red, 83 green and 135 blue out of 255, or 34.9% / 32.5% / 52.9% by channel.

What is #595387 in HSL and HSV?

hsl(247, 24%, 43%) and hsv(247, 39%, 53%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #595387 a light or a dark color?

It is a dark color. Relative luminance is 0.1006 and perceived brightness is 36%, so white text on it reaches 6.97:1.

Should I use black or white text on #595387?

White. It scores 6.97:1 against #595387, versus 3.01:1 for black — AA at any size.

Is #595387 accessible on a white background?

#595387 on white scores 6.97:1, which clears AA at every size but not AAA.

What is the complementary color of #595387?

#818753 sits directly opposite on the wheel. Softer options are the split-complements #877353 and #678753, which give the same contrast with far less vibration.

What colors go well with #595387?

For interface work: #F6F6F9 as the surface, #CFCCE0 for borders, #5E578E for secondary text, #8B834F as an accent and #34314F for hover and pressed states. For a palette, the analogous pair #536787 and #735387 stays calm, while #818753 is the loudest partner.

What is #595387 in CMYK for printing?

cmyk(34%, 39%, 0%, 47%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #595387 warm or cool?

Cool — it scores 70 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #6C5387; nudged cooler, #515F89.

Which Tailwind color is closest to #595387?

The slate family — its 500 step is #64748b, ΔE2000 14.2 away. That is a visible difference, so define #595387 as a custom token rather than reaching for the built-in.

How do I use #595387 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#595387] or text-[#595387], 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 #595387 with 50% opacity?

rgba(89, 83, 135, 0.5), or #59538780 in eight-digit hex. Over white that composites to #ACA9C3; over black, #2D2A44.

Is #595387 a web-safe color?

No. The nearest web-safe colour is #666699, ΔE2000 6.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #595387 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 #595387?

The safest is same-hue elevation: linear-gradient(135deg, #7670A7, #595387 45%, #34314F). For more colour, a short hue run to #6E4774 keeps it rich without turning muddy.

Work with #595387 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #595387 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.