#313D91#313D91

#313D91 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.138 H 272.4°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#313D91
RGB	rgb(49, 61, 145)
HSL	hsl(233, 49%, 38%)
HSV	hsv(233, 66%, 57%)
CMYK	cmyk(66.2%, 57.9%, 0%, 43.1%)
CIE-LAB	lab(29.50, 23.41, -48.01)
CIE-LCH	lch(29.50, 53.42, 296.00°)
OKLab	oklab(40.13% 0.0059 -0.1381)
OKLCH	oklch(40.13% 0.138 272.4)
XYZ	xyz(8.0445, 6.0341, 27.5233)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D91 #918531

analogous

#316D91 #313D91 #553191

triadic

#313D91 #91313D #3D9131

tetradic

#313D91 #91316D #918531 #319155

square

#313D91 #91316D #918531 #319155

split-complementary

#313D91 #915531 #6D9131

monochromatic

#121736 #222A63 #313D91 #4150BF #6E7ACE

Accessibility & contrast

On white

9.52

#313D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#313D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D91

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D91	#FFFFFF	#000000	##FFFFFF
##313D91	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A94

Deuteranopia (green-blind)

#00418F

Tritanopia (blue-blind)

#005161

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313d91;
/* rgb */ color: rgb(49, 61, 145);
/* oklch */ color: oklch(40.1% 0.138 272.4);

Tailwind

colors: {
  custom: {
    50: '#7472b2',
    500: '#313d91',
    950: '#000000',
  },
}

SCSS

$custom: #313d91;
$custom-light: #7472b2;
$custom-dark: #000000;

JSON

{
  "hex": "#313d91",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 145
  },
  "hsl": {
    "h": 232.5,
    "s": 49.485,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40133,
    "c": 0.13821,
    "h": 272.4
  },
  "luminance": 0.06035
}

Semantic roles & 50–950 ramp

primary

#313D91

secondary

#B6AC68

accent

#C84FD9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #313D91

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

Preview Lab → · Contrast checker → · Palette generator →