#313EAB#313EAB

#313EAB is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.6% C 0.173 H 271.6°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#313EAB
RGB	rgb(49, 62, 171)
HSL	hsl(234, 55%, 43%)
HSV	hsv(234, 71%, 67%)
CMYK	cmyk(71.3%, 63.7%, 0%, 32.9%)
CIE-LAB	lab(31.89, 32.24, -59.87)
CIE-LCH	lch(31.89, 67.99, 298.30°)
OKLab	oklab(42.57% 0.0047 -0.1729)
OKLCH	oklch(42.57% 0.173 271.6)
XYZ	xyz(10.3374, 7.0375, 39.3338)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.34

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313EAB #AB9E31

analogous

#317BAB #313EAB #6131AB

triadic

#313EAB #AB313E #3EAB31

tetradic

#313EAB #AB317B #AB9E31 #31AB61

square

#313EAB #AB317B #AB9E31 #31AB61

split-complementary

#313EAB #AB6131 #7BAB31

monochromatic

#161C4C #232D7B #313EAB #4D5BCC #7D87DA

Accessibility & contrast

On white

8.72

#313EAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#313EAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313EAB

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313EAB	#FFFFFF	#000000	##FFFFFF
##313EAB	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)

#0051AF

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313eab;
/* rgb */ color: rgb(49, 62, 171);
/* oklch */ color: oklch(42.6% 0.173 271.6);

Tailwind

colors: {
  custom: {
    50: '#7a73c5',
    500: '#313eab',
    950: '#000000',
  },
}

SCSS

$custom: #313eab;
$custom-light: #7a73c5;
$custom-dark: #000000;

JSON

{
  "hex": "#313eab",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 171
  },
  "hsl": {
    "h": 233.607,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42573,
    "c": 0.17295,
    "h": 271.6
  },
  "luminance": 0.07038
}

Semantic roles & 50–950 ramp

primary

#313EAB

secondary

#C2BA75

accent

#CF49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313EAB

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

Preview Lab → · Contrast checker → · Palette generator →