#3931B8#3931B8

#3931B8 is a dark, highly saturated blue. Relative luminance 0.065; OKLCH L 42.2% C 0.202 H 276.0°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#3931B8
RGB	rgb(57, 49, 184)
HSL	hsl(244, 58%, 46%)
HSV	hsv(244, 73%, 72%)
CMYK	cmyk(69%, 73.4%, 0%, 27.8%)
CIE-LAB	lab(30.70, 45.52, -69.54)
CIE-LCH	lch(30.70, 83.12, 303.21°)
OKLab	oklab(42.22% 0.021 -0.201)
OKLCH	oklch(42.22% 0.202 276)
XYZ	xyz(11.4345, 6.5261, 45.9952)
Luminance	0.0653 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.11

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3931B8 #B0B831

analogous

#316CB8 #3931B8 #7D31B8

triadic

#3931B8 #B83931 #31B839

tetradic

#3931B8 #B8316C #B0B831 #31B87D

square

#3931B8 #B8316C #B0B831 #31B87D

split-complementary

#3931B8 #B87D31 #6CB831

monochromatic

#1B1757 #2A2488 #3931B8 #5C55D2 #8A85DE

Accessibility & contrast

On white

9.11

#3931B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3931B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3931B8

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3931B8	#FFFFFF	#000000	##FFFFFF
##3931B8	1.00	9.11	2.31	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBC

Deuteranopia (green-blind)

#0042B6

Tritanopia (blue-blind)

#005772

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3931b8;
/* rgb */ color: rgb(57, 49, 184);
/* oklch */ color: oklch(42.2% 0.202 276.0);

Tailwind

colors: {
  custom: {
    50: '#816bcf',
    500: '#3931b8',
    950: '#000000',
  },
}

SCSS

$custom: #3931b8;
$custom-light: #816bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3931b8",
  "rgb": {
    "r": 57,
    "g": 49,
    "b": 184
  },
  "hsl": {
    "h": 243.556,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42215,
    "c": 0.20208,
    "h": 276
  },
  "luminance": 0.06527
}

Semantic roles & 50–950 ramp

primary

#3931B8

secondary

#C4C87D

accent

#E147D8

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3931B8

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

Preview Lab → · Contrast checker → · Palette generator →