#3921B2#3921B2

#3921B2 is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.6% C 0.209 H 278.4°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#3921B2
RGB	rgb(57, 33, 178)
HSL	hsl(250, 69%, 41%)
HSV	hsv(250, 81%, 70%)
CMYK	cmyk(68%, 81.5%, 0%, 30.2%)
CIE-LAB	lab(27.22, 51.83, -71.73)
CIE-LCH	lch(27.22, 88.50, 305.85°)
OKLab	oklab(39.58% 0.0306 -0.2072)
OKLCH	oklch(39.58% 0.209 278.4)
XYZ	xyz(10.2645, 5.1710, 42.5680)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3921B2 #9AB221

analogous

#2152B2 #3921B2 #8221B2

triadic

#3921B2 #B23921 #21B239

tetradic

#3921B2 #B22152 #9AB221 #21B282

square

#3921B2 #B22152 #9AB221 #21B282

split-complementary

#3921B2 #B28221 #52B221

monochromatic

#180E4B #28177E #3921B2 #5136DA #7E6AE3

Accessibility & contrast

On white

10.32

#3921B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#3921B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3921B2

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3921B2	#FFFFFF	#000000	##FFFFFF
##3921B2	1.00	10.32	2.03	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046B6

Deuteranopia (green-blind)

#003AB0

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #3921b2;
/* rgb */ color: rgb(57, 33, 178);
/* oklch */ color: oklch(39.6% 0.209 278.4);

Tailwind

colors: {
  custom: {
    50: '#8162ca',
    500: '#3921b2',
    950: '#000000',
  },
}

SCSS

$custom: #3921b2;
$custom-light: #8162ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3921b2",
  "rgb": {
    "r": 57,
    "g": 33,
    "b": 178
  },
  "hsl": {
    "h": 249.931,
    "s": 68.72,
    "l": 41.373
  },
  "oklch": {
    "l": 0.39582,
    "c": 0.20944,
    "h": 278.4
  },
  "luminance": 0.05172
}

Semantic roles & 50–950 ramp

primary

#3921B2

secondary

#B9C966

accent

#EC3CCF

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0513

muted

#7D7A82

Preview Lab

Preview with #3921B2

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

Preview Lab → · Contrast checker → · Palette generator →