#3031B5#3031B5

#3031B5 is a dark, highly saturated blue. Relative luminance 0.062; OKLCH L 41.3% C 0.201 H 273.0°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#3031B5
RGB	rgb(48, 49, 181)
HSL	hsl(240, 58%, 45%)
HSV	hsv(240, 73%, 71%)
CMYK	cmyk(73.5%, 72.9%, 0%, 29%)
CIE-LAB	lab(29.81, 43.62, -69.25)
CIE-LCH	lch(29.81, 81.84, 302.21°)
OKLab	oklab(41.34% 0.0105 -0.2003)
OKLCH	oklch(41.34% 0.201 273)
XYZ	xyz(10.6549, 6.1601, 44.3346)
Luminance	0.0616 (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

#3031B5 #B5B430

analogous

#3073B5 #3031B5 #7230B5

triadic

#3031B5 #B53031 #31B530

tetradic

#3031B5 #B53073 #B5B430 #30B572

square

#3031B5 #B53073 #B5B430 #30B572

split-complementary

#3031B5 #B57230 #73B530

monochromatic

#161754 #232485 #3031B5 #5152D1 #8282DE

Accessibility & contrast

On white

9.41

#3031B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#3031B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3031B5

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3031B5	#FFFFFF	#000000	##FFFFFF
##3031B5	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB9

Deuteranopia (green-blind)

#0040B3

Tritanopia (blue-blind)

#005770

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3031b5;
/* rgb */ color: rgb(48, 49, 181);
/* oklch */ color: oklch(41.3% 0.201 273.0);

Tailwind

colors: {
  custom: {
    50: '#7d6acc',
    500: '#3031b5',
    950: '#000000',
  },
}

SCSS

$custom: #3031b5;
$custom-light: #7d6acc;
$custom-dark: #000000;

JSON

{
  "hex": "#3031b5",
  "rgb": {
    "r": 48,
    "g": 49,
    "b": 181
  },
  "hsl": {
    "h": 239.549,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.41337,
    "c": 0.20062,
    "h": 273
  },
  "luminance": 0.06161
}

Semantic roles & 50–950 ramp

primary

#3031B5

secondary

#C7C67A

accent

#E046E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3031B5

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

Preview Lab → · Contrast checker → · Palette generator →