#313FA5#313FA5

#313FA5 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.164 H 271.5°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#313FA5
RGB	rgb(49, 63, 165)
HSL	hsl(233, 54%, 42%)
HSV	hsv(233, 70%, 65%)
CMYK	cmyk(70.3%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(31.63, 29.41, -56.69)
CIE-LCH	lch(31.63, 63.87, 297.42°)
OKLab	oklab(42.22% 0.0042 -0.1636)
OKLCH	oklch(42.22% 0.164 271.5)
XYZ	xyz(9.8334, 6.9236, 36.4082)
Luminance	0.0693 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FA5 #A59731

analogous

#3179A5 #313FA5 #5D31A5

triadic

#313FA5 #A5313F #3FA531

tetradic

#313FA5 #A53179 #A59731 #31A55D

square

#313FA5 #A53179 #A59731 #31A55D

split-complementary

#313FA5 #A55D31 #79A531

monochromatic

#151B47 #232D76 #313FA5 #4A59C9 #7985D7

Accessibility & contrast

On white

8.81

#313FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#313FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FA5

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FA5	#FFFFFF	#000000	##FFFFFF
##313FA5	1.00	8.81	2.39	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A8

Deuteranopia (green-blind)

#0045A3

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313fa5;
/* rgb */ color: rgb(49, 63, 165);
/* oklch */ color: oklch(42.2% 0.164 271.5);

Tailwind

colors: {
  custom: {
    50: '#7974c1',
    500: '#313fa5',
    950: '#000000',
  },
}

SCSS

$custom: #313fa5;
$custom-light: #7974c1;
$custom-dark: #000000;

JSON

{
  "hex": "#313fa5",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 232.759,
    "s": 54.206,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42223,
    "c": 0.16361,
    "h": 271.5
  },
  "luminance": 0.06925
}

Semantic roles & 50–950 ramp

primary

#313FA5

secondary

#C0B672

accent

#CC4ADE

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313FA5

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

Preview Lab → · Contrast checker → · Palette generator →