#313FA4#313FA4

#313FA4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.162 H 271.5°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#313FA4
RGB	rgb(49, 63, 164)
HSL	hsl(233, 54%, 42%)
HSV	hsv(233, 70%, 64%)
CMYK	cmyk(70.1%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(31.55, 29.05, -56.23)
CIE-LCH	lch(31.55, 63.29, 297.32°)
OKLab	oklab(42.14% 0.0042 -0.1622)
OKLCH	oklch(42.14% 0.162 271.5)
XYZ	xyz(9.7427, 6.8874, 35.9307)
Luminance	0.0689 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FA4 #A49631

analogous

#3179A4 #313FA4 #5D31A4

triadic

#313FA4 #A4313F #3FA431

tetradic

#313FA4 #A43179 #A49631 #31A45D

square

#313FA4 #A43179 #A49631 #31A45D

split-complementary

#313FA4 #A45D31 #79A431

monochromatic

#151B46 #232D75 #313FA4 #4959C9 #7984D7

Accessibility & contrast

On white

8.83

#313FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#313FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FA4

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FA4	#FFFFFF	#000000	##FFFFFF
##313FA4	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A7

Deuteranopia (green-blind)

#0045A2

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313fa4;
/* rgb */ color: rgb(49, 63, 164);
/* oklch */ color: oklch(42.1% 0.162 271.5);

Tailwind

colors: {
  custom: {
    50: '#7874c0',
    500: '#313fa4',
    950: '#000000',
  },
}

SCSS

$custom: #313fa4;
$custom-light: #7874c0;
$custom-dark: #000000;

JSON

{
  "hex": "#313fa4",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 232.696,
    "s": 53.991,
    "l": 41.765
  },
  "oklch": {
    "l": 0.42136,
    "c": 0.16225,
    "h": 271.5
  },
  "luminance": 0.06888
}

Semantic roles & 50–950 ramp

primary

#313FA4

secondary

#BFB672

accent

#CB4ADD

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313FA4

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

Preview Lab → · Contrast checker → · Palette generator →