#313B9B#313B9B

#313B9B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.155 H 272.8°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#313B9B
RGB	rgb(49, 59, 155)
HSL	hsl(234, 52%, 40%)
HSV	hsv(234, 68%, 61%)
CMYK	cmyk(68.4%, 61.9%, 0%, 39.2%)
CIE-LAB	lab(29.78, 28.40, -53.67)
CIE-LCH	lch(29.78, 60.72, 297.89°)
OKLab	oklab(40.59% 0.0076 -0.1547)
OKLCH	oklch(40.59% 0.155 272.8)
XYZ	xyz(8.7450, 6.1467, 31.7296)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B9B #9B9131

analogous

#31709B #313B9B #5C319B

triadic

#313B9B #9B313B #3B9B31

tetradic

#313B9B #9B3170 #9B9131 #319B5C

square

#313B9B #9B3170 #9B9131 #319B5C

split-complementary

#313B9B #9B5C31 #709B31

monochromatic

#14183E #22296D #313B9B #4551C4 #737CD3

Accessibility & contrast

On white

9.42

#313B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#313B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B9B

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B9B	#FFFFFF	#000000	##FFFFFF
##313B9B	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004199

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313b9b;
/* rgb */ color: rgb(49, 59, 155);
/* oklch */ color: oklch(40.6% 0.155 272.8);

Tailwind

colors: {
  custom: {
    50: '#7771b9',
    500: '#313b9b',
    950: '#000000',
  },
}

SCSS

$custom: #313b9b;
$custom-light: #7771b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313b9b",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 155
  },
  "hsl": {
    "h": 234.34,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.40594,
    "c": 0.15491,
    "h": 272.8
  },
  "luminance": 0.06147
}

Semantic roles & 50–950 ramp

primary

#313B9B

secondary

#BBB46D

accent

#CE4CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313B9B

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

Preview Lab → · Contrast checker → · Palette generator →