#3831B9#3831B9

#3831B9 is a dark, highly saturated blue. Relative luminance 0.065; OKLCH L 42.2% C 0.204 H 275.5°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#3831B9
RGB	rgb(56, 49, 185)
HSL	hsl(243, 58%, 46%)
HSV	hsv(243, 74%, 73%)
CMYK	cmyk(69.7%, 73.5%, 0%, 27.5%)
CIE-LAB	lab(30.73, 45.74, -70.09)
CIE-LCH	lch(30.73, 83.69, 303.13°)
OKLab	oklab(42.25% 0.0195 -0.2026)
OKLCH	oklch(42.25% 0.204 275.5)
XYZ	xyz(11.4833, 6.5391, 46.5465)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.10

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3831B9 #B2B931

analogous

#316EB9 #3831B9 #7C31B9

triadic

#3831B9 #B93831 #31B938

tetradic

#3831B9 #B9316E #B2B931 #31B97C

square

#3831B9 #B9316E #B2B931 #31B97C

split-complementary

#3831B9 #B97C31 #6EB931

monochromatic

#1B1758 #292489 #3831B9 #5C55D2 #8A86DF

Accessibility & contrast

On white

9.10

#3831B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3831B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3831B9

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3831B9	#FFFFFF	#000000	##FFFFFF
##3831B9	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)

#004EBD

Deuteranopia (green-blind)

#0042B7

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3831b9;
/* rgb */ color: rgb(56, 49, 185);
/* oklch */ color: oklch(42.2% 0.204 275.5);

Tailwind

colors: {
  custom: {
    50: '#816bcf',
    500: '#3831b9',
    950: '#000000',
  },
}

SCSS

$custom: #3831b9;
$custom-light: #816bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3831b9",
  "rgb": {
    "r": 56,
    "g": 49,
    "b": 185
  },
  "hsl": {
    "h": 243.088,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.42249,
    "c": 0.20354,
    "h": 275.5
  },
  "luminance": 0.0654
}

Semantic roles & 50–950 ramp

primary

#3831B9

secondary

#C5C87D

accent

#E146D9

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3831B9

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

Preview Lab → · Contrast checker → · Palette generator →