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blue · cool

#35339f

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

Token name suggestion: Slate Sapphire

RGB
53, 51, 159
HSL
241°, 51%, 41%
CMYK
67, 68, 0, 38
Luminance
0.0563

#35339f is a dark vivid blue, 241° on the wheel and 83/100 on the cool side. Put white text on it (9.88:1). As text it scores 9.88:1 on white — safe at any size. Nearest name is Dark Slate Blue, nearest Tailwind family is indigo.

hsl(241 51% 41%)rgb(53 51 159)Base step 700AAA inkCool

At a glance

Every number on this page in one read: what #35339f is made of, how bright it looks, and which way it leans.

Hex
#35339f
Hue
241°
blue
Saturation
51%
vivid
Lightness
41%
dark
Brightness
62%
HSV value
Perceived
28%
weighted brightness
Luminance
0.0563
WCAG relative
Temperature
Cool
83/100 cool
Color family
Blue
Tone
Vivid
Best ink
White
9.88:1
Closest name
Dark Slate Blue
ΔE2000 5.5
Chroma
68.2
LCH, 0–130ish
OKLCH L
0.398
perceptual lightness
Tailwind
indigo
500 · ΔE 19.3
Web-safe
#333399
nearest of 216
Where it sits
Hue241° of 360°
Saturation51%
Lightness41%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #35339f.

Temperature
Warm ← → Cool83% 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
Red13%
Green42%
Blue44%

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

Every format

HEX#35339f
HEX (8-digit)#35339fff
RGBrgb(53, 51, 159)
RGBArgba(53, 51, 159, 1)
HSLhsl(241, 51%, 41%)
HSV / HSBhsv(241, 68%, 62%)
HWBhwb(241 20% 38%)
CMYKcmyk(67%, 68%, 0%, 38%)
LABlab(28.4 35.5 -58.3)
LCHlch(28.4 68.2 301.4)
OKLCHoklch(0.398 0.169 276.3)
XYZ (D65)xyz(8.91, 5.63, 33.41)
Decimal3486623
Display P3color(display-p3 0.208 0.200 0.624)
Web-safe#333399

Copy-ready code

every platformclick to select
/* CSS */
color: #35339f;
background-color: #35339f;
/* CSS custom property */
--brand: #35339f;
/* Tailwind (arbitrary) */
class="text-[#35339f] bg-[#35339f]"
/* SCSS */
$brand: #35339f;
/* SwiftUI */
Color(red: 0.208, green: 0.200, blue: 0.624)
/* UIKit */
UIColor(red: 0.208, green: 0.200, blue: 0.624, alpha: 1)
/* Android XML */
<color name="brand">#35339F</color>
/* Android Compose */
Color(0xFF35339F)
/* Flutter */
Color(0xFF35339F)
/* Python / OpenCV (BGR) */
(159, 51, 53)
/* Python / PIL (RGB) */
(53, 51, 159)
/* Java AWT */
new Color(53, 51, 159)
/* .NET */
Color.FromArgb(255, 53, 51, 159)
/* OpenGL / Unity (0–1) */
(0.2078f, 0.2000f, 0.6235f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{53,51,159}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #35339f 85%, white);
border-color: color-mix(in oklab, #35339f 40%, transparent);
/* theme-aware in one line */
color: light-dark(#201F61, #D3D3EE);
/* relative colour syntax */
--hover: hsl(from #35339f 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: #F4F4FA;
  --brand-100: #EAEAF6;
  --brand-200: #CFCFED;
  --brand-300: #ABAAE4;
  --brand-400: #8180D6;
  --brand-500: #5755C8;
  --brand-600: #3E3BB9;
  --brand-700: #35339f;
  --brand-800: #29287C;
  --brand-900: #21205A;
  --brand-950: #151438;
  --brand: #35339f;
  --brand-ink: #ffffff;
  --brand-surface: #F4F4FA;
  --brand-border: #C2C1EB;
  --brand-hover: #2C2A84;
  --brand-pressed: #232269;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141424;
    --brand-ink: #D3D3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F4FA',
        100: '#EAEAF6',
        200: '#CFCFED',
        300: '#ABAAE4',
        400: '#8180D6',
        500: '#5755C8',
        600: '#3E3BB9',
        700: '#35339f',
        800: '#29287C',
        900: '#21205A',
        950: '#151438',
        DEFAULT: '#35339f',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F4FA,
  '100': #EAEAF6,
  '200': #CFCFED,
  '300': #ABAAE4,
  '400': #8180D6,
  '500': #5755C8,
  '600': #3E3BB9,
  '700': #35339f,
  '800': #29287C,
  '900': #21205A,
  '950': #151438,
);
$brand-base: #35339f;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F4FA", "$type": "color" },
      "100": { "$value": "#EAEAF6", "$type": "color" },
      "200": { "$value": "#CFCFED", "$type": "color" },
      "300": { "$value": "#ABAAE4", "$type": "color" },
      "400": { "$value": "#8180D6", "$type": "color" },
      "500": { "$value": "#5755C8", "$type": "color" },
      "600": { "$value": "#3E3BB9", "$type": "color" },
      "700": { "$value": "#35339f", "$type": "color" },
      "800": { "$value": "#29287C", "$type": "color" },
      "900": { "$value": "#21205A", "$type": "color" },
      "950": { "$value": "#151438", "$type": "color" }
    },
    "brandInk": { "$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 #35339f · 9.88:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 9.88:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.13:1
AA fail · AA large fail · AAA fail
Reading the other direction: #35339f as text scores 9.88:1 on white and 2.13:1 on black.
Best tinted ink on it, if plain black or white feels flat: #ECECF9 at 8.44:1.

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
#35339f · 9.88:1
AA on whitealready passes
#35339f
The quick fox
#35339f · 9.88:1
AAA on whitealready passes
#35339f
The quick fox
#6B69CF · 4.55:1
AA on black+20% L
#6B69CF
The quick fox
#9190DB · 7.22:1
AAA on black+30% L
#9190DB

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #35339F 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
#35339f on white: 9.88:1
AA ✓ pass · AA-large · AAA
Aa
#35339f on black: 2.13:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #35339f as text on that neutral, and that neutral as text on #35339f.

NeutralRatioBoth directions
White9.88:1AaAa
Slate 509.44:1AaAa
Slate 1009.02:1AaAa
Slate 2008.01:1AaAa
Slate 3006.65:1AaAa
Slate 4003.85:1AaAa
Slate 5002.08:1AaAa
Slate 6001.30:1AaAa
Slate 7001.05:1AaAa
Slate 8001.48:1AaAa
Slate 9001.81:1AaAa
Black2.13:1AaAa
Colour vision deficiency
true color
protanopia · #0048A2
deuteranopia · #003E9D
tritanopia · #004F64

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. #35339f 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.

#F4F4FA
#EAEAF6
#CFCFED
#ABAAE4
#8180D6
#5755C8
#3E3BB9
#35339f
#29287C
#21205A
#151438
Base = 700Lightest = 50 · #F4F4FADarkest = 950 · #151438Text step on white = 500
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 0.042 276.3);
  --brand-100: oklch(0.94 0.068 276.3);
  --brand-200: oklch(0.88 0.101 276.3);
  --brand-300: oklch(0.80 0.132 276.3);
  --brand-400: oklch(0.72 0.156 276.3);
  --brand-500: oklch(0.64 0.169 276.3);
  --brand-600: oklch(0.56 0.169 276.3);
  --brand-700: oklch(0.48 0.159 276.3);
  --brand-800: oklch(0.40 0.142 276.3);
  --brand-900: oklch(0.32 0.118 276.3);
  --brand-950: oklch(0.24 0.093 276.3);
}

Colors that work with #35339f

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#F4F4FA
Tinted page background
Border#C2C1EB
Hairlines and dividers
Muted text#4C4B9B
Captions on the surface
Accent#A3882F
Second voice, not a rival
Dark variant#201F61
Hover, pressed, headers
Light variant#ECECF9
Selected rows, tints
Dark surface#141424
Dark-mode background
Hover#2C2A84
One step down in lightness
Pressed#232269
Two steps down
Disabled#8D8DB6
Chroma pulled out
Focus ring#2F2CBA
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 #35339f

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

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • Full-page backgrounds — tiring over long sessions
  • 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.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. 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-high
  • 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#9D9F33
Analogous left#33679F
Analogous right#6B339F
Split-complement 1#9F6B33
Split-complement 2#679F33
Triadic 1#9F3533
Triadic 2#339F35
Tetradic#9F3367
On the wheel
Base+30°−30°+120°+240°+180°241°

#35339f sits at 241°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red20.8%
Green20.0%
Blue62.4%
R · 0–255
53
0x35
G · 0–255
51
0x33
B · 0–255
159
0x9f

CMYK percentages

Cyan66.7%
Magenta67.9%
Yellow0.0%
Key (black)37.6%

Total ink coverage is 172%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#35339f text on a black background

contrast 2.13:1

Card sample

#35339f text on a white background

contrast 9.88:1

Card sample

#35339f on grey

9.02:1

#35339f on its own surface

9.02:1

#35339f on its dark surface

1.84:1

CSS3 live lab

Text font color

The quick brown fox

color: #35339f;
Background color
Panel with #35339f background
background-color: #35339f;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #35339f;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(53, 51, 159, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(53, 51, 159, 0.45);
Border & gradient
Gradient panel
border: 3px solid #35339f;
background: linear-gradient(135deg, #35339f, #7D339F);
Gradient text

Gradient headline

background: linear-gradient(90deg, #35339f, #98339F);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #35339f;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #35339f;
caret-color: #35339f;
Left rule
Pull quote or callout
border-left: 4px solid #35339f;
Ring + tint
Selected chip
background: #ECECF9;
box-shadow: inset 0 0 0 2px #35339f;
Conic badge
68%
background: conic-gradient(#35339f 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #35339f 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(53, 51, 159, 0.5)
rgb(53 51 159 / 50%)
#35339f80
hsl(241 51% 41% / 50%)
color-mix(in srgb, #35339f 50%, transparent)
Alpha8-digit hexFlat on white
10%#35339f1a#EBEBF5
20%#35339f33#D7D6EC
40%#35339f66#AEADD9
60%#35339f99#8685C5
80%#35339fcc#5D5CB2

Gradients from #35339f

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, #4D4AC5, #35339f 45%, #201F61);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #35339f, #732C88);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #35339f, #9D9F33);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #6361CC 0%, #35339f 45%, #201F61 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #438BC3 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #853AB6 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #201F61 0%, transparent 65%), #35339f;

Monochromatic scale

Palettes built from #35339f

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.

#35339f 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 2.13:1 — lift it to #6B69CF 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.

#35339f, answered

What color is #35339f?

#35339f is a dark vivid blue, closest to Dark Slate Blue (ΔE2000 5.5). It sits at 241° on the hue wheel with 51% saturation and 41% lightness, which reads as cool.

What is the RGB value of #35339f?

rgb(53, 51, 159) — 53 red, 51 green and 159 blue out of 255, or 20.8% / 20% / 62.4% by channel.

What is #35339f in HSL and HSV?

hsl(241, 51%, 41%) and hsv(241, 68%, 62%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #35339f a light or a dark color?

It is a dark color. Relative luminance is 0.0563 and perceived brightness is 28%, so white text on it reaches 9.88:1.

Should I use black or white text on #35339f?

White. It scores 9.88:1 against #35339f, versus 2.13:1 for black — AAA at any size.

Is #35339f accessible on a white background?

#35339f on white scores 9.88:1, which clears AAA at every size.

What is the complementary color of #35339f?

#9D9F33 sits directly opposite on the wheel. Softer options are the split-complements #9F6B33 and #679F33, which give the same contrast with far less vibration.

What colors go well with #35339f?

For interface work: #F4F4FA as the surface, #C2C1EB for borders, #4C4B9B for secondary text, #A3882F as an accent and #201F61 for hover and pressed states. For a palette, the analogous pair #33679F and #6B339F stays calm, while #9D9F33 is the loudest partner.

What is #35339f in CMYK for printing?

cmyk(67%, 68%, 0%, 38%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #35339f warm or cool?

Cool — it scores 83 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #5D339F; nudged cooler, #3152A1.

Which Tailwind color is closest to #35339f?

The indigo family — its 500 step is #6366f1, ΔE2000 19.3 away. That is a visible difference, so define #35339f as a custom token rather than reaching for the built-in.

How do I use #35339f in Tailwind CSS?

Inline it as an arbitrary value with bg-[#35339f] or text-[#35339f], 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 #35339f with 50% opacity?

rgba(53, 51, 159, 0.5), or #35339f80 in eight-digit hex. Over white that composites to #9A99CF; over black, #1B1A50.

Is #35339f a web-safe color?

No. The nearest web-safe colour is #333399, ΔE2000 1 away. The palette only matters for legacy displays and some email clients now.

What does the color #35339f 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 chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #35339f?

The safest is same-hue elevation: linear-gradient(135deg, #4D4AC5, #35339f 45%, #201F61). For more colour, a short hue run to #732C88 keeps it rich without turning muddy.

Work with #35339f in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #35339f at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.