#313C99#313C99

#313C99 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.151 H 272.6°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#313C99
RGB	rgb(49, 60, 153)
HSL	hsl(234, 51%, 40%)
HSV	hsv(234, 68%, 60%)
CMYK	cmyk(68%, 60.8%, 0%, 40%)
CIE-LAB	lab(29.87, 27.01, -52.30)
CIE-LCH	lch(29.87, 58.86, 297.31°)
OKLab	oklab(40.61% 0.0068 -0.1507)
OKLCH	oklch(40.61% 0.151 272.6)
XYZ	xyz(8.6303, 6.1838, 30.8696)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C99 #998E31

analogous

#317099 #313C99 #5A3199

triadic

#313C99 #99313C #3C9931

tetradic

#313C99 #993170 #998E31 #31995A

square

#313C99 #993170 #998E31 #31995A

split-complementary

#313C99 #995A31 #709931

monochromatic

#13183C #222A6B #313C99 #4452C3 #727DD2

Accessibility & contrast

On white

9.39

#313C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#313C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C99

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C99	#FFFFFF	#000000	##FFFFFF
##313C99	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004297

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313c99;
/* rgb */ color: rgb(49, 60, 153);
/* oklch */ color: oklch(40.6% 0.151 272.6);

Tailwind

colors: {
  custom: {
    50: '#7671b8',
    500: '#313c99',
    950: '#000000',
  },
}

SCSS

$custom: #313c99;
$custom-light: #7671b8;
$custom-dark: #000000;

JSON

{
  "hex": "#313c99",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 233.654,
    "s": 51.485,
    "l": 39.608
  },
  "oklch": {
    "l": 0.40611,
    "c": 0.15085,
    "h": 272.6
  },
  "luminance": 0.06185
}

Semantic roles & 50–950 ramp

primary

#313C99

secondary

#BAB26C

accent

#CC4DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #313C99

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

Preview Lab → · Contrast checker → · Palette generator →