#313E9B#313E9B

#313E9B is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.2% C 0.151 H 271.9°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#313E9B
RGB	rgb(49, 62, 155)
HSL	hsl(233, 52%, 40%)
HSV	hsv(233, 68%, 61%)
CMYK	cmyk(68.4%, 60%, 0%, 39.2%)
CIE-LAB	lab(30.55, 26.42, -52.40)
CIE-LCH	lch(30.55, 58.69, 296.75°)
OKLab	oklab(41.17% 0.0051 -0.151)
OKLCH	oklch(41.17% 0.151 271.9)
XYZ	xyz(8.9037, 6.4639, 31.7824)
Luminance	0.0646 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313E9B #9B8E31

analogous

#31739B #313E9B #59319B

triadic

#313E9B #9B313E #3E9B31

tetradic

#313E9B #9B3173 #9B8E31 #319B59

square

#313E9B #9B3173 #9B8E31 #319B59

split-complementary

#313E9B #9B5931 #739B31

monochromatic

#14193E #222B6D #313E9B #4555C4 #737FD3

Accessibility & contrast

On white

9.16

#313E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#313E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313E9B

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313E9B	#FFFFFF	#000000	##FFFFFF
##313E9B	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004399

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #313e9b;
/* rgb */ color: rgb(49, 62, 155);
/* oklch */ color: oklch(41.2% 0.151 271.9);

Tailwind

colors: {
  custom: {
    50: '#7773b9',
    500: '#313e9b',
    950: '#000000',
  },
}

SCSS

$custom: #313e9b;
$custom-light: #7773b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313e9b",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 155
  },
  "hsl": {
    "h": 232.642,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.41168,
    "c": 0.15107,
    "h": 271.9
  },
  "luminance": 0.06465
}

Semantic roles & 50–950 ramp

primary

#313E9B

secondary

#BBB16D

accent

#CA4CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313E9B

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

Preview Lab → · Contrast checker → · Palette generator →