#313C9F#313C9F

#313C9F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.159 H 272.4°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#313C9F
RGB	rgb(49, 60, 159)
HSL	hsl(234, 53%, 41%)
HSV	hsv(234, 69%, 62%)
CMYK	cmyk(69.2%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(30.37, 29.19, -55.13)
CIE-LCH	lch(30.37, 62.39, 297.90°)
OKLab	oklab(41.13% 0.0067 -0.159)
OKLCH	oklch(41.13% 0.159 272.4)
XYZ	xyz(9.1384, 6.3870, 33.5454)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C9F #9F9431

analogous

#31739F #313C9F #5D319F

triadic

#313C9F #9F313C #3C9F31

tetradic

#313C9F #9F3173 #9F9431 #319F5D

square

#313C9F #9F3173 #9F9431 #319F5D

split-complementary

#313C9F #9F5D31 #739F31

monochromatic

#141941 #232A70 #313C9F #4754C6 #767FD5

Accessibility & contrast

On white

9.22

#313C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#313C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C9F

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C9F	#FFFFFF	#000000	##FFFFFF
##313C9F	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00439D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313c9f;
/* rgb */ color: rgb(49, 60, 159);
/* oklch */ color: oklch(41.1% 0.159 272.4);

Tailwind

colors: {
  custom: {
    50: '#7871bc',
    500: '#313c9f',
    950: '#000000',
  },
}

SCSS

$custom: #313c9f;
$custom-light: #7871bc;
$custom-dark: #000000;

JSON

{
  "hex": "#313c9f",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 234,
    "s": 52.885,
    "l": 40.784
  },
  "oklch": {
    "l": 0.41133,
    "c": 0.15915,
    "h": 272.4
  },
  "luminance": 0.06388
}

Semantic roles & 50–950 ramp

primary

#313C9F

secondary

#BDB56F

accent

#CE4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313C9F

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

Preview Lab → · Contrast checker → · Palette generator →