#312F8B#312F8B

#312F8B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 37.0% C 0.148 H 277.3°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#312F8B
RGB	rgb(49, 47, 139)
HSL	hsl(241, 49%, 36%)
HSV	hsv(241, 66%, 55%)
CMYK	cmyk(64.7%, 66.2%, 0%, 45.5%)
CIE-LAB	lab(25.41, 30.51, -50.96)
CIE-LCH	lch(25.41, 59.39, 300.91°)
OKLab	oklab(36.96% 0.0188 -0.1469)
OKLCH	oklch(36.96% 0.148 277.3)
XYZ	xyz(6.9418, 4.5495, 24.9334)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312F8B #898B2F

analogous

#2F5B8B #312F8B #5F2F8B

triadic

#312F8B #8B312F #2F8B31

tetradic

#312F8B #8B2F5B #898B2F #2F8B5F

square

#312F8B #8B2F5B #898B2F #2F8B5F

split-complementary

#312F8B #8B5F2F #5B8B2F

monochromatic

#111030 #21205D #312F8B #413EB9 #6B68CC

Accessibility & contrast

On white

10.99

#312F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#312F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312F8B

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312F8B	#FFFFFF	#000000	##FFFFFF
##312F8B	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408E

Deuteranopia (green-blind)

#003889

Tritanopia (blue-blind)

#004758

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #312f8b;
/* rgb */ color: rgb(49, 47, 139);
/* oklch */ color: oklch(37.0% 0.148 277.3);

Tailwind

colors: {
  custom: {
    50: '#7468ae',
    500: '#312f8b',
    950: '#000000',
  },
}

SCSS

$custom: #312f8b;
$custom-light: #7468ae;
$custom-dark: #000000;

JSON

{
  "hex": "#312f8b",
  "rgb": {
    "r": 49,
    "g": 47,
    "b": 139
  },
  "hsl": {
    "h": 241.304,
    "s": 49.462,
    "l": 36.471
  },
  "oklch": {
    "l": 0.36961,
    "c": 0.14805,
    "h": 277.3
  },
  "luminance": 0.0455
}

Semantic roles & 50–950 ramp

primary

#312F8B

secondary

#B1B363

accent

#D94FD6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #312F8B

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

Preview Lab → · Contrast checker → · Palette generator →