#3131BC#3131BC

#3131BC is a dark, highly saturated blue. Relative luminance 0.065; OKLCH L 42.1% C 0.209 H 272.9°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#3131BC
RGB	rgb(49, 49, 188)
HSL	hsl(240, 59%, 46%)
HSV	hsv(240, 74%, 74%)
CMYK	cmyk(73.9%, 73.9%, 0%, 26.3%)
CIE-LAB	lab(30.59, 46.04, -72.11)
CIE-LCH	lch(30.59, 85.56, 302.56°)
OKLab	oklab(42.12% 0.0104 -0.2087)
OKLCH	oklch(42.12% 0.209 272.9)
XYZ	xyz(11.4390, 6.4793, 48.2150)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.84

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3131BC #BCBC31

analogous

#3177BC #3131BC #7731BC

triadic

#3131BC #BC3131 #31BC31

tetradic

#3131BC #BC3177 #BCBC31 #31BC77

square

#3131BC #BC3177 #BCBC31 #31BC77

split-complementary

#3131BC #BC7731 #77BC31

monochromatic

#18185B #24248B #3131BC #5757D3 #8888E0

Accessibility & contrast

On white

9.15

#3131BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3131BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131BC

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131BC	#FFFFFF	#000000	##FFFFFF
##3131BC	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FC0

Deuteranopia (green-blind)

#0041BA

Tritanopia (blue-blind)

#005974

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3131bc;
/* rgb */ color: rgb(49, 49, 188);
/* oklch */ color: oklch(42.1% 0.209 272.9);

Tailwind

colors: {
  custom: {
    50: '#7f6bd1',
    500: '#3131bc',
    950: '#000000',
  },
}

SCSS

$custom: #3131bc;
$custom-light: #7f6bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3131bc",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 188
  },
  "hsl": {
    "h": 240,
    "s": 58.65,
    "l": 46.471
  },
  "oklch": {
    "l": 0.4212,
    "c": 0.20893,
    "h": 272.9
  },
  "luminance": 0.0648
}

Semantic roles & 50–950 ramp

primary

#3131BC

secondary

#CACA7F

accent

#E246E2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3131BC

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

Preview Lab → · Contrast checker → · Palette generator →