#3131B7#3131B7

#3131B7 is a dark, highly saturated blue. Relative luminance 0.063; OKLCH L 41.6% C 0.203 H 273.2°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#3131B7
RGB	rgb(49, 49, 183)
HSL	hsl(240, 58%, 45%)
HSV	hsv(240, 73%, 72%)
CMYK	cmyk(73.2%, 73.2%, 0%, 28.2%)
CIE-LAB	lab(30.08, 44.38, -70.00)
CIE-LCH	lch(30.08, 82.88, 302.38°)
OKLab	oklab(41.6% 0.0113 -0.2025)
OKLCH	oklch(41.6% 0.203 273.2)
XYZ	xyz(10.9093, 6.2674, 45.4254)
Luminance	0.0627 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3131B7 #B7B731

analogous

#3174B7 #3131B7 #7431B7

triadic

#3131B7 #B73131 #31B731

tetradic

#3131B7 #B73174 #B7B731 #31B774

square

#3131B7 #B73174 #B7B731 #31B774

split-complementary

#3131B7 #B77431 #74B731

monochromatic

#171756 #242487 #3131B7 #5454D1 #8484DE

Accessibility & contrast

On white

9.32

#3131B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#3131B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B7

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B7	#FFFFFF	#000000	##FFFFFF
##3131B7	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DBB

Deuteranopia (green-blind)

#0040B5

Tritanopia (blue-blind)

#005771

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3131b7;
/* rgb */ color: rgb(49, 49, 183);
/* oklch */ color: oklch(41.6% 0.203 273.2);

Tailwind

colors: {
  custom: {
    50: '#7e6bce',
    500: '#3131b7',
    950: '#000000',
  },
}

SCSS

$custom: #3131b7;
$custom-light: #7e6bce;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b7",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 183
  },
  "hsl": {
    "h": 240,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.41602,
    "c": 0.20284,
    "h": 273.2
  },
  "luminance": 0.06268
}

Semantic roles & 50–950 ramp

primary

#3131B7

secondary

#C8C87C

accent

#E147E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3131B7

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

Preview Lab → · Contrast checker → · Palette generator →