#313BA8#313BA8

#313BA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.173 H 272.3°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#313BA8
RGB	rgb(49, 59, 168)
HSL	hsl(235, 55%, 43%)
HSV	hsv(235, 71%, 66%)
CMYK	cmyk(70.8%, 64.9%, 0%, 34.1%)
CIE-LAB	lab(30.90, 33.09, -59.70)
CIE-LCH	lch(30.90, 68.26, 299.00°)
OKLab	oklab(41.76% 0.007 -0.1724)
OKLCH	oklch(41.76% 0.173 272.3)
XYZ	xyz(9.8961, 6.6071, 37.7920)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313BA8 #A89E31

analogous

#3176A8 #313BA8 #6231A8

triadic

#313BA8 #A8313B #3BA831

tetradic

#313BA8 #A83176 #A89E31 #31A862

square

#313BA8 #A83176 #A89E31 #31A862

split-complementary

#313BA8 #A86231 #76A831

monochromatic

#151A49 #232A79 #313BA8 #4C56CB #7B83D8

Accessibility & contrast

On white

9.05

#313BA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#313BA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313BA8

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313BA8	#FFFFFF	#000000	##FFFFFF
##313BA8	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#00576C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313ba8;
/* rgb */ color: rgb(49, 59, 168);
/* oklch */ color: oklch(41.8% 0.173 272.3);

Tailwind

colors: {
  custom: {
    50: '#7a71c3',
    500: '#313ba8',
    950: '#000000',
  },
}

SCSS

$custom: #313ba8;
$custom-light: #7a71c3;
$custom-dark: #000000;

JSON

{
  "hex": "#313ba8",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 168
  },
  "hsl": {
    "h": 234.958,
    "s": 54.839,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4176,
    "c": 0.17256,
    "h": 272.3
  },
  "luminance": 0.06608
}

Semantic roles & 50–950 ramp

primary

#313BA8

secondary

#C1BB74

accent

#D24ADE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #313BA8

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

Preview Lab → · Contrast checker → · Palette generator →