#312BB5#312BB5

#312BB5 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.6% C 0.206 H 274.0°. Best body text is #FFFFFF at 9.80:1 contrast (WCAG AA passes).

Color values

HEX	#312BB5
RGB	rgb(49, 43, 181)
HSL	hsl(243, 62%, 44%)
HSV	hsv(243, 76%, 71%)
CMYK	cmyk(72.9%, 76.2%, 0%, 29%)
CIE-LAB	lab(28.68, 47.07, -71.11)
CIE-LCH	lch(28.68, 85.28, 303.50°)
OKLab	oklab(40.55% 0.0145 -0.2057)
OKLCH	oklch(40.55% 0.206 274)
XYZ	xyz(10.4682, 5.7159, 44.2587)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BB5 #AFB52B

analogous

#2B6AB5 #312BB5 #762BB5

triadic

#312BB5 #B5312B #2BB531

tetradic

#312BB5 #B52B6A #AFB52B #2BB576

square

#312BB5 #B52B6A #AFB52B #2BB576

split-complementary

#312BB5 #B5762B #6AB52B

monochromatic

#161452 #241F84 #312BB5 #4F49D4 #7F7BE0

Accessibility & contrast

On white

9.80

#312BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#312BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BB5

9.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BB5	#FFFFFF	#000000	##FFFFFF
##312BB5	1.00	9.80	2.14	9.80
#FFFFFF	9.80	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB9

Deuteranopia (green-blind)

#003DB3

Tritanopia (blue-blind)

#00546E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #312bb5;
/* rgb */ color: rgb(49, 43, 181);
/* oklch */ color: oklch(40.6% 0.206 274.0);

Tailwind

colors: {
  custom: {
    50: '#7e67cd',
    500: '#312bb5',
    950: '#000000',
  },
}

SCSS

$custom: #312bb5;
$custom-light: #7e67cd;
$custom-dark: #000000;

JSON

{
  "hex": "#312bb5",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 181
  },
  "hsl": {
    "h": 242.609,
    "s": 61.607,
    "l": 43.922
  },
  "oklch": {
    "l": 0.40553,
    "c": 0.20622,
    "h": 274
  },
  "luminance": 0.05717
}

Semantic roles & 50–950 ramp

primary

#312BB5

secondary

#C4C874

accent

#E543DE

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #312BB5

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

Preview Lab → · Contrast checker → · Palette generator →