#312BB1#312BB1

#312BB1 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.1% C 0.201 H 274.4°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#312BB1
RGB	rgb(49, 43, 177)
HSL	hsl(243, 61%, 43%)
HSV	hsv(243, 76%, 69%)
CMYK	cmyk(72.3%, 75.7%, 0%, 30.6%)
CIE-LAB	lab(28.26, 45.77, -69.43)
CIE-LCH	lch(28.26, 83.16, 303.40°)
OKLab	oklab(40.13% 0.0154 -0.2008)
OKLCH	oklch(40.13% 0.201 274.4)
XYZ	xyz(10.0637, 5.5541, 42.1281)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BB1 #ABB12B

analogous

#2B68B1 #312BB1 #742BB1

triadic

#312BB1 #B1312B #2BB131

tetradic

#312BB1 #B12B68 #ABB12B #2BB174

square

#312BB1 #B12B68 #ABB12B #2BB174

split-complementary

#312BB1 #B1742B #68B12B

monochromatic

#16134F #231F80 #312BB1 #4D47D2 #7D78DE

Accessibility & contrast

On white

9.95

#312BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#312BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BB1

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BB1	#FFFFFF	#000000	##FFFFFF
##312BB1	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B5

Deuteranopia (green-blind)

#003CAF

Tritanopia (blue-blind)

#00526C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #312bb1;
/* rgb */ color: rgb(49, 43, 177);
/* oklch */ color: oklch(40.1% 0.201 274.4);

Tailwind

colors: {
  custom: {
    50: '#7d67ca',
    500: '#312bb1',
    950: '#000000',
  },
}

SCSS

$custom: #312bb1;
$custom-light: #7d67ca;
$custom-dark: #000000;

JSON

{
  "hex": "#312bb1",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 177
  },
  "hsl": {
    "h": 242.687,
    "s": 60.909,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40126,
    "c": 0.2014,
    "h": 274.4
  },
  "luminance": 0.05555
}

Semantic roles & 50–950 ramp

primary

#312BB1

secondary

#C2C672

accent

#E444DD

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #312BB1

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

Preview Lab → · Contrast checker → · Palette generator →