#312FAC#312FAC

#312FAC is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.2% C 0.191 H 274.3°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#312FAC
RGB	rgb(49, 47, 172)
HSL	hsl(241, 57%, 43%)
HSV	hsv(241, 73%, 67%)
CMYK	cmyk(71.5%, 72.7%, 0%, 32.5%)
CIE-LAB	lab(28.55, 41.86, -65.96)
CIE-LCH	lch(28.55, 78.12, 302.40°)
OKLab	oklab(40.18% 0.0142 -0.1907)
OKLCH	oklch(40.18% 0.191 274.3)
XYZ	xyz(9.7271, 5.6636, 39.6023)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.42

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312FAC #AAAC2F

analogous

#2F6BAC #312FAC #6F2FAC

triadic

#312FAC #AC312F #2FAC31

tetradic

#312FAC #AC2F6B #AAAC2F #2FAC6F

square

#312FAC #AC2F6B #AAAC2F #2FAC6F

split-complementary

#312FAC #AC6F2F #6BAC2F

monochromatic

#16154C #23227C #312FAC #4D4BCE #7C7BDB

Accessibility & contrast

On white

9.85

#312FAC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#312FAC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312FAC

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312FAC	#FFFFFF	#000000	##FFFFFF
##312FAC	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B0

Deuteranopia (green-blind)

#003DAA

Tritanopia (blue-blind)

#00526A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #312fac;
/* rgb */ color: rgb(49, 47, 172);
/* oklch */ color: oklch(40.2% 0.191 274.3);

Tailwind

colors: {
  custom: {
    50: '#7c69c6',
    500: '#312fac',
    950: '#000000',
  },
}

SCSS

$custom: #312fac;
$custom-light: #7c69c6;
$custom-dark: #000000;

JSON

{
  "hex": "#312fac",
  "rgb": {
    "r": 49,
    "g": 47,
    "b": 172
  },
  "hsl": {
    "h": 240.96,
    "s": 57.078,
    "l": 42.941
  },
  "oklch": {
    "l": 0.40177,
    "c": 0.19126,
    "h": 274.3
  },
  "luminance": 0.05665
}

Semantic roles & 50–950 ramp

primary

#312FAC

secondary

#C2C374

accent

#E047DE

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #312FAC

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

Preview Lab → · Contrast checker → · Palette generator →