#313DA9#313DA9

#313DA9 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.171 H 271.8°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#313DA9
RGB	rgb(49, 61, 169)
HSL	hsl(234, 55%, 43%)
HSV	hsv(234, 71%, 66%)
CMYK	cmyk(71%, 63.9%, 0%, 33.7%)
CIE-LAB	lab(31.47, 32.16, -59.36)
CIE-LCH	lch(31.47, 67.51, 298.45°)
OKLab	oklab(42.21% 0.0055 -0.1714)
OKLCH	oklch(42.21% 0.171 271.8)
XYZ	xyz(10.0944, 6.8540, 38.3194)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313DA9 #A99D31

analogous

#3179A9 #313DA9 #6131A9

triadic

#313DA9 #A9313D #3DA931

tetradic

#313DA9 #A93179 #A99D31 #31A961

square

#313DA9 #A93179 #A99D31 #31A961

split-complementary

#313DA9 #A96131 #79A931

monochromatic

#151B4A #232C7A #313DA9 #4C59CB #7C85D9

Accessibility & contrast

On white

8.86

#313DA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#313DA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DA9

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DA9	#FFFFFF	#000000	##FFFFFF
##313DA9	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AC

Deuteranopia (green-blind)

#0045A7

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313da9;
/* rgb */ color: rgb(49, 61, 169);
/* oklch */ color: oklch(42.2% 0.171 271.8);

Tailwind

colors: {
  custom: {
    50: '#7a72c3',
    500: '#313da9',
    950: '#000000',
  },
}

SCSS

$custom: #313da9;
$custom-light: #7a72c3;
$custom-dark: #000000;

JSON

{
  "hex": "#313da9",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 169
  },
  "hsl": {
    "h": 234,
    "s": 55.046,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42211,
    "c": 0.17149,
    "h": 271.8
  },
  "luminance": 0.06855
}

Semantic roles & 50–950 ramp

primary

#313DA9

secondary

#C1BA74

accent

#CF49DE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #313DA9

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

Preview Lab → · Contrast checker → · Palette generator →