#3931B5#3931B5

#3931B5 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.9% C 0.198 H 276.2°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#3931B5
RGB	rgb(57, 49, 181)
HSL	hsl(244, 57%, 45%)
HSV	hsv(244, 73%, 71%)
CMYK	cmyk(68.5%, 72.9%, 0%, 29%)
CIE-LAB	lab(30.40, 44.55, -68.25)
CIE-LCH	lch(30.40, 81.51, 303.13°)
OKLab	oklab(41.91% 0.0215 -0.1972)
OKLCH	oklch(41.91% 0.198 276.2)
XYZ	xyz(11.1234, 6.4017, 44.3566)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.93

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3931B5 #ADB531

analogous

#316BB5 #3931B5 #7B31B5

triadic

#3931B5 #B53931 #31B539

tetradic

#3931B5 #B5316B #ADB531 #31B57B

square

#3931B5 #B5316B #ADB531 #31B57B

split-complementary

#3931B5 #B57B31 #6BB531

monochromatic

#1B1755 #2A2485 #3931B5 #5A53D0 #8883DD

Accessibility & contrast

On white

9.21

#3931B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#3931B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3931B5

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3931B5	#FFFFFF	#000000	##FFFFFF
##3931B5	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB9

Deuteranopia (green-blind)

#0042B3

Tritanopia (blue-blind)

#005670

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3931b5;
/* rgb */ color: rgb(57, 49, 181);
/* oklch */ color: oklch(41.9% 0.198 276.2);

Tailwind

colors: {
  custom: {
    50: '#816bcc',
    500: '#3931b5',
    950: '#000000',
  },
}

SCSS

$custom: #3931b5;
$custom-light: #816bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3931b5",
  "rgb": {
    "r": 57,
    "g": 49,
    "b": 181
  },
  "hsl": {
    "h": 243.636,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.41913,
    "c": 0.1984,
    "h": 276.2
  },
  "luminance": 0.06403
}

Semantic roles & 50–950 ramp

primary

#3931B5

secondary

#C2C77B

accent

#E147D7

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3931B5

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

Preview Lab → · Contrast checker → · Palette generator →