#313FA8#313FA8

#313FA8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.168 H 271.4°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#313FA8
RGB	rgb(49, 63, 168)
HSL	hsl(233, 55%, 43%)
HSV	hsv(233, 71%, 66%)
CMYK	cmyk(70.8%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(31.88, 30.50, -58.08)
CIE-LCH	lch(31.88, 65.61, 297.71°)
OKLab	oklab(42.49% 0.0041 -0.1676)
OKLCH	oklch(42.49% 0.168 271.4)
XYZ	xyz(10.1096, 7.0341, 37.8631)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FA8 #A89A31

analogous

#317BA8 #313FA8 #5E31A8

triadic

#313FA8 #A8313F #3FA831

tetradic

#313FA8 #A8317B #A89A31 #31A85E

square

#313FA8 #A8317B #A89A31 #31A85E

split-complementary

#313FA8 #A85E31 #7BA831

monochromatic

#151B49 #232D79 #313FA8 #4C5ACB #7B86D8

Accessibility & contrast

On white

8.72

#313FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#313FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FA8

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FA8	#FFFFFF	#000000	##FFFFFF
##313FA8	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0046A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313fa8;
/* rgb */ color: rgb(49, 63, 168);
/* oklch */ color: oklch(42.5% 0.168 271.4);

Tailwind

colors: {
  custom: {
    50: '#7974c3',
    500: '#313fa8',
    950: '#000000',
  },
}

SCSS

$custom: #313fa8;
$custom-light: #7974c3;
$custom-dark: #000000;

JSON

{
  "hex": "#313fa8",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 232.941,
    "s": 54.839,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42488,
    "c": 0.16769,
    "h": 271.4
  },
  "luminance": 0.07035
}

Semantic roles & 50–950 ramp

primary

#313FA8

secondary

#C1B874

accent

#CD4ADE

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #313FA8

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

Preview Lab → · Contrast checker → · Palette generator →