#3531BB#3531BB

#3531BB is a dark, highly saturated blue. Relative luminance 0.065; OKLCH L 42.3% C 0.207 H 274.3°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#3531BB
RGB	rgb(53, 49, 187)
HSL	hsl(242, 58%, 46%)
HSV	hsv(242, 74%, 73%)
CMYK	cmyk(71.7%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(30.74, 46.09, -71.27)
CIE-LCH	lch(30.74, 84.88, 302.89°)
OKLab	oklab(42.26% 0.0154 -0.2061)
OKLCH	oklch(42.26% 0.207 274.3)
XYZ	xyz(11.5332, 6.5402, 47.6587)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.02

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3531BB #B7BB31

analogous

#3172BB #3531BB #7A31BB

triadic

#3531BB #BB3531 #31BB35

tetradic

#3531BB #BB3172 #B7BB31 #31BB7A

square

#3531BB #BB3172 #B7BB31 #31BB7A

split-complementary

#3531BB #BB7A31 #72BB31

monochromatic

#1A185A #27248B #3531BB #5A56D3 #8987E0

Accessibility & contrast

On white

9.10

#3531BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3531BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3531BB

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3531BB	#FFFFFF	#000000	##FFFFFF
##3531BB	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0042B9

Tritanopia (blue-blind)

#005973

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3531bb;
/* rgb */ color: rgb(53, 49, 187);
/* oklch */ color: oklch(42.3% 0.207 274.3);

Tailwind

colors: {
  custom: {
    50: '#806bd1',
    500: '#3531bb',
    950: '#000000',
  },
}

SCSS

$custom: #3531bb;
$custom-light: #806bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3531bb",
  "rgb": {
    "r": 53,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 241.739,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42259,
    "c": 0.2067,
    "h": 274.3
  },
  "luminance": 0.06541
}

Semantic roles & 50–950 ramp

primary

#3531BB

secondary

#C7C97F

accent

#E246DD

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3531BB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →