#3921B4#3921B4

#3921B4 is a dark, highly saturated blue. Relative luminance 0.053; OKLCH L 39.8% C 0.212 H 278.1°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#3921B4
RGB	rgb(57, 33, 180)
HSL	hsl(250, 69%, 42%)
HSV	hsv(250, 82%, 71%)
CMYK	cmyk(68.3%, 81.7%, 0%, 29.4%)
CIE-LAB	lab(27.44, 52.42, -72.55)
CIE-LCH	lch(27.44, 89.51, 305.85°)
OKLab	oklab(39.8% 0.03 -0.2096)
OKLCH	oklch(39.8% 0.212 278.1)
XYZ	xyz(10.4668, 5.2519, 43.6333)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3921B4 #9CB421

analogous

#2153B4 #3921B4 #8321B4

triadic

#3921B4 #B43921 #21B439

tetradic

#3921B4 #B42153 #9CB421 #21B483

square

#3921B4 #B42153 #9CB421 #21B483

split-complementary

#3921B4 #B48321 #53B421

monochromatic

#180E4D #291880 #3921B4 #5238DA #7F6BE4

Accessibility & contrast

On white

10.24

#3921B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#3921B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3921B4

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3921B4	#FFFFFF	#000000	##FFFFFF
##3921B4	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046B8

Deuteranopia (green-blind)

#003BB1

Tritanopia (blue-blind)

#004F6C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #3921b4;
/* rgb */ color: rgb(57, 33, 180);
/* oklch */ color: oklch(39.8% 0.212 278.1);

Tailwind

colors: {
  custom: {
    50: '#8262cc',
    500: '#3921b4',
    950: '#000000',
  },
}

SCSS

$custom: #3921b4;
$custom-light: #8262cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3921b4",
  "rgb": {
    "r": 57,
    "g": 33,
    "b": 180
  },
  "hsl": {
    "h": 249.796,
    "s": 69.014,
    "l": 41.765
  },
  "oklch": {
    "l": 0.39803,
    "c": 0.21172,
    "h": 278.1
  },
  "luminance": 0.05253
}

Semantic roles & 50–950 ramp

primary

#3921B4

secondary

#BACA67

accent

#EC3CCF

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0514

muted

#7D7A82

Preview Lab

Preview with #3921B4

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

Preview Lab → · Contrast checker → · Palette generator →