#313C9E#313C9E

#313C9E is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.158 H 272.4°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#313C9E
RGB	rgb(49, 60, 158)
HSL	hsl(234, 53%, 41%)
HSV	hsv(234, 69%, 62%)
CMYK	cmyk(69%, 62%, 0%, 38%)
CIE-LAB	lab(30.28, 28.83, -54.66)
CIE-LCH	lch(30.28, 61.80, 297.81°)
OKLab	oklab(41.05% 0.0067 -0.1576)
OKLCH	oklch(41.05% 0.158 272.4)
XYZ	xyz(9.0520, 6.3525, 33.0902)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C9E #9E9331

analogous

#31729E #313C9E #5C319E

triadic

#313C9E #9E313C #3C9E31

tetradic

#313C9E #9E3172 #9E9331 #319E5C

square

#313C9E #9E3172 #9E9331 #319E5C

split-complementary

#313C9E #9E5C31 #729E31

monochromatic

#141941 #232A6F #313C9E #4653C6 #757FD4

Accessibility & contrast

On white

9.25

#313C9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#313C9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C9E

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C9E	#FFFFFF	#000000	##FFFFFF
##313C9E	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00429C

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313c9e;
/* rgb */ color: rgb(49, 60, 158);
/* oklch */ color: oklch(41.0% 0.158 272.4);

Tailwind

colors: {
  custom: {
    50: '#7771bb',
    500: '#313c9e',
    950: '#000000',
  },
}

SCSS

$custom: #313c9e;
$custom-light: #7771bb;
$custom-dark: #000000;

JSON

{
  "hex": "#313c9e",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 158
  },
  "hsl": {
    "h": 233.945,
    "s": 52.657,
    "l": 40.588
  },
  "oklch": {
    "l": 0.41045,
    "c": 0.15778,
    "h": 272.4
  },
  "luminance": 0.06353
}

Semantic roles & 50–950 ramp

primary

#313C9E

secondary

#BCB46E

accent

#CE4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313C9E

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

Preview Lab → · Contrast checker → · Palette generator →