#313BA9#313BA9

#313BA9 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.174 H 272.3°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#313BA9
RGB	rgb(49, 59, 169)
HSL	hsl(235, 55%, 43%)
HSV	hsv(235, 71%, 66%)
CMYK	cmyk(71%, 65.1%, 0%, 33.7%)
CIE-LAB	lab(30.98, 33.45, -60.16)
CIE-LCH	lch(30.98, 68.83, 299.07°)
OKLab	oklab(41.85% 0.007 -0.1737)
OKLCH	oklch(41.85% 0.174 272.3)
XYZ	xyz(9.9896, 6.6445, 38.2845)
Luminance	0.0664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313BA9 #A99F31

analogous

#3177A9 #313BA9 #6331A9

triadic

#313BA9 #A9313B #3BA931

tetradic

#313BA9 #A93177 #A99F31 #31A963

square

#313BA9 #A93177 #A99F31 #31A963

split-complementary

#313BA9 #A96331 #77A931

monochromatic

#151A4A #232A7A #313BA9 #4C57CB #7C83D9

Accessibility & contrast

On white

9.02

#313BA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#313BA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313BA9

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313BA9	#FFFFFF	#000000	##FFFFFF
##313BA9	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAC

Deuteranopia (green-blind)

#0043A7

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313ba9;
/* rgb */ color: rgb(49, 59, 169);
/* oklch */ color: oklch(41.9% 0.174 272.3);

Tailwind

colors: {
  custom: {
    50: '#7a71c4',
    500: '#313ba9',
    950: '#000000',
  },
}

SCSS

$custom: #313ba9;
$custom-light: #7a71c4;
$custom-dark: #000000;

JSON

{
  "hex": "#313ba9",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 169
  },
  "hsl": {
    "h": 235,
    "s": 55.046,
    "l": 42.745
  },
  "oklch": {
    "l": 0.41852,
    "c": 0.17389,
    "h": 272.3
  },
  "luminance": 0.06645
}

Semantic roles & 50–950 ramp

primary

#313BA9

secondary

#C1BB74

accent

#D249DE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #313BA9

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

Preview Lab → · Contrast checker → · Palette generator →