#313A9B#313A9B

#313A9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.156 H 273.1°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#313A9B
RGB	rgb(49, 58, 155)
HSL	hsl(235, 52%, 40%)
HSV	hsv(235, 68%, 61%)
CMYK	cmyk(68.4%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(29.53, 29.06, -54.08)
CIE-LCH	lch(29.53, 61.39, 298.25°)
OKLab	oklab(40.41% 0.0085 -0.1559)
OKLCH	oklch(40.41% 0.156 273.1)
XYZ	xyz(8.6941, 6.0448, 31.7126)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A9B #9B9231

analogous

#316F9B #313A9B #5D319B

triadic

#313A9B #9B313A #3A9B31

tetradic

#313A9B #9B316F #9B9231 #319B5D

square

#313A9B #9B316F #9B9231 #319B5D

split-complementary

#313A9B #9B5D31 #6F9B31

monochromatic

#14173E #22296D #313A9B #4550C4 #737CD3

Accessibility & contrast

On white

9.51

#313A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#313A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A9B

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A9B	#FFFFFF	#000000	##FFFFFF
##313A9B	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#004199

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313a9b;
/* rgb */ color: rgb(49, 58, 155);
/* oklch */ color: oklch(40.4% 0.156 273.1);

Tailwind

colors: {
  custom: {
    50: '#7770b9',
    500: '#313a9b',
    950: '#000000',
  },
}

SCSS

$custom: #313a9b;
$custom-light: #7770b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313a9b",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 234.906,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.40407,
    "c": 0.15617,
    "h": 273.1
  },
  "luminance": 0.06046
}

Semantic roles & 50–950 ramp

primary

#313A9B

secondary

#BBB46D

accent

#CF4CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313A9B

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

Preview Lab → · Contrast checker → · Palette generator →