#313FA3#313FA3

#313FA3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.0% C 0.161 H 271.5°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#313FA3
RGB	rgb(49, 63, 163)
HSL	hsl(233, 54%, 42%)
HSV	hsv(233, 70%, 64%)
CMYK	cmyk(69.9%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(31.47, 28.68, -55.76)
CIE-LCH	lch(31.47, 62.70, 297.22°)
OKLab	oklab(42.05% 0.0042 -0.1608)
OKLCH	oklch(42.05% 0.161 271.5)
XYZ	xyz(9.6528, 6.8514, 35.4570)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FA3 #A39531

analogous

#3178A3 #313FA3 #5C31A3

triadic

#313FA3 #A3313F #3FA331

tetradic

#313FA3 #A33178 #A39531 #31A35C

square

#313FA3 #A33178 #A39531 #31A35C

split-complementary

#313FA3 #A35C31 #78A331

monochromatic

#151B45 #232D74 #313FA3 #4959C8 #7884D6

Accessibility & contrast

On white

8.86

#313FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#313FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FA3

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FA3	#FFFFFF	#000000	##FFFFFF
##313FA3	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0045A1

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313fa3;
/* rgb */ color: rgb(49, 63, 163);
/* oklch */ color: oklch(42.0% 0.161 271.5);

Tailwind

colors: {
  custom: {
    50: '#7874bf',
    500: '#313fa3',
    950: '#000000',
  },
}

SCSS

$custom: #313fa3;
$custom-light: #7874bf;
$custom-dark: #000000;

JSON

{
  "hex": "#313fa3",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 232.632,
    "s": 53.774,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42048,
    "c": 0.16088,
    "h": 271.5
  },
  "luminance": 0.06852
}

Semantic roles & 50–950 ramp

primary

#313FA3

secondary

#BFB571

accent

#CB4BDD

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313FA3

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

Preview Lab → · Contrast checker → · Palette generator →