#313A99#313A99

#313A99 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.153 H 273.2°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#313A99
RGB	rgb(49, 58, 153)
HSL	hsl(235, 51%, 40%)
HSV	hsv(235, 68%, 60%)
CMYK	cmyk(68%, 62.1%, 0%, 40%)
CIE-LAB	lab(29.36, 28.33, -53.14)
CIE-LCH	lch(29.36, 60.22, 298.07°)
OKLab	oklab(40.23% 0.0085 -0.1532)
OKLCH	oklch(40.23% 0.153 273.2)
XYZ	xyz(8.5275, 5.9782, 30.8353)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A99 #999031

analogous

#316E99 #313A99 #5C3199

triadic

#313A99 #99313A #3A9931

tetradic

#313A99 #99316E #999031 #31995C

square

#313A99 #99316E #999031 #31995C

split-complementary

#313A99 #995C31 #6E9931

monochromatic

#13173C #22286B #313A99 #444FC3 #727BD2

Accessibility & contrast

On white

9.56

#313A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#313A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A99

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A99	#FFFFFF	#000000	##FFFFFF
##313A99	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#004197

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313a99;
/* rgb */ color: rgb(49, 58, 153);
/* oklch */ color: oklch(40.2% 0.153 273.2);

Tailwind

colors: {
  custom: {
    50: '#7670b8',
    500: '#313a99',
    950: '#000000',
  },
}

SCSS

$custom: #313a99;
$custom-light: #7670b8;
$custom-dark: #000000;

JSON

{
  "hex": "#313a99",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 153
  },
  "hsl": {
    "h": 234.808,
    "s": 51.485,
    "l": 39.608
  },
  "oklch": {
    "l": 0.40231,
    "c": 0.15341,
    "h": 273.2
  },
  "luminance": 0.05979
}

Semantic roles & 50–950 ramp

primary

#313A99

secondary

#BAB36C

accent

#CF4DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #313A99

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

Preview Lab → · Contrast checker → · Palette generator →