#313D9A#313D9A

#313D9A is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.9% C 0.151 H 272.3°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#313D9A
RGB	rgb(49, 61, 154)
HSL	hsl(233, 52%, 40%)
HSV	hsv(233, 68%, 60%)
CMYK	cmyk(68.2%, 60.4%, 0%, 39.6%)
CIE-LAB	lab(30.21, 26.71, -52.35)
CIE-LCH	lch(30.21, 58.77, 297.03°)
OKLab	oklab(40.89% 0.006 -0.1508)
OKLCH	oklch(40.89% 0.151 272.3)
XYZ	xyz(8.7661, 6.3227, 31.3240)
Luminance	0.0632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D9A #9A8E31

analogous

#31719A #313D9A #5A319A

triadic

#313D9A #9A313D #3D9A31

tetradic

#313D9A #9A3171 #9A8E31 #319A5A

square

#313D9A #9A3171 #9A8E31 #319A5A

split-complementary

#313D9A #9A5A31 #719A31

monochromatic

#13183D #222B6C #313D9A #4553C4 #737ED2

Accessibility & contrast

On white

9.27

#313D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#313D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D9A

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D9A	#FFFFFF	#000000	##FFFFFF
##313D9A	1.00	9.27	2.26	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9D

Deuteranopia (green-blind)

#004398

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313d9a;
/* rgb */ color: rgb(49, 61, 154);
/* oklch */ color: oklch(40.9% 0.151 272.3);

Tailwind

colors: {
  custom: {
    50: '#7672b9',
    500: '#313d9a',
    950: '#000000',
  },
}

SCSS

$custom: #313d9a;
$custom-light: #7672b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313d9a",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 154
  },
  "hsl": {
    "h": 233.143,
    "s": 51.724,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40889,
    "c": 0.15096,
    "h": 272.3
  },
  "luminance": 0.06324
}

Semantic roles & 50–950 ramp

primary

#313D9A

secondary

#BAB16C

accent

#CB4DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #313D9A

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

Preview Lab → · Contrast checker → · Palette generator →