#313DAB#313DAB

#313DAB is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.174 H 271.8°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#313DAB
RGB	rgb(49, 61, 171)
HSL	hsl(234, 55%, 43%)
HSV	hsv(234, 71%, 67%)
CMYK	cmyk(71.3%, 64.3%, 0%, 32.9%)
CIE-LAB	lab(31.65, 32.88, -60.27)
CIE-LCH	lch(31.65, 68.66, 298.62°)
OKLab	oklab(42.39% 0.0054 -0.1741)
OKLCH	oklch(42.39% 0.174 271.8)
XYZ	xyz(10.2836, 6.9297, 39.3158)
Luminance	0.0693 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.25

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313DAB #AB9F31

analogous

#317AAB #313DAB #6231AB

triadic

#313DAB #AB313D #3DAB31

tetradic

#313DAB #AB317A #AB9F31 #31AB62

square

#313DAB #AB317A #AB9F31 #31AB62

split-complementary

#313DAB #AB6231 #7AAB31

monochromatic

#161B4C #232C7B #313DAB #4D5ACC #7D86DA

Accessibility & contrast

On white

8.80

#313DAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#313DAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DAB

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DAB	#FFFFFF	#000000	##FFFFFF
##313DAB	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AF

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313dab;
/* rgb */ color: rgb(49, 61, 171);
/* oklch */ color: oklch(42.4% 0.174 271.8);

Tailwind

colors: {
  custom: {
    50: '#7a72c5',
    500: '#313dab',
    950: '#000000',
  },
}

SCSS

$custom: #313dab;
$custom-light: #7a72c5;
$custom-dark: #000000;

JSON

{
  "hex": "#313dab",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 171
  },
  "hsl": {
    "h": 234.098,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42392,
    "c": 0.17415,
    "h": 271.8
  },
  "luminance": 0.06931
}

Semantic roles & 50–950 ramp

primary

#313DAB

secondary

#C2BB75

accent

#D049DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313DAB

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

Preview Lab → · Contrast checker → · Palette generator →