#313F9C#313F9C

#313F9C is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.4% C 0.151 H 271.6°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#313F9C
RGB	rgb(49, 63, 156)
HSL	hsl(232, 52%, 40%)
HSV	hsv(232, 69%, 61%)
CMYK	cmyk(68.6%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(30.90, 26.12, -52.46)
CIE-LCH	lch(30.90, 58.60, 296.47°)
OKLab	oklab(41.45% 0.0043 -0.1511)
OKLCH	oklch(41.45% 0.151 271.6)
XYZ	xyz(9.0429, 6.6074, 32.2448)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F9C #9C8E31

analogous

#31749C #313F9C #59319C

triadic

#313F9C #9C313F #3F9C31

tetradic

#313F9C #9C3174 #9C8E31 #319C59

square

#313F9C #9C3174 #9C8E31 #319C59

split-complementary

#313F9C #9C5931 #749C31

monochromatic

#14193F #222C6D #313F9C #4556C5 #7481D3

Accessibility & contrast

On white

9.05

#313F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#313F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F9C

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F9C	#FFFFFF	#000000	##FFFFFF
##313F9C	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9F

Deuteranopia (green-blind)

#00449A

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313f9c;
/* rgb */ color: rgb(49, 63, 156);
/* oklch */ color: oklch(41.4% 0.151 271.6);

Tailwind

colors: {
  custom: {
    50: '#7773ba',
    500: '#313f9c',
    950: '#000000',
  },
}

SCSS

$custom: #313f9c;
$custom-light: #7773ba;
$custom-dark: #000000;

JSON

{
  "hex": "#313f9c",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 232.15,
    "s": 52.195,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41447,
    "c": 0.15118,
    "h": 271.6
  },
  "luminance": 0.06608
}

Semantic roles & 50–950 ramp

primary

#313F9C

secondary

#BBB16D

accent

#C94CDC

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313F9C

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

Preview Lab → · Contrast checker → · Palette generator →