#313AB5#313AB5

#313AB5 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.191 H 272.0°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#313AB5
RGB	rgb(49, 58, 181)
HSL	hsl(236, 57%, 45%)
HSV	hsv(236, 73%, 71%)
CMYK	cmyk(72.9%, 68%, 0%, 29%)
CIE-LAB	lab(31.84, 38.32, -65.91)
CIE-LCH	lch(31.84, 76.24, 300.17°)
OKLab	oklab(42.81% 0.0066 -0.1906)
OKLCH	oklch(42.81% 0.191 272)
XYZ	xyz(11.1174, 7.0141, 44.4751)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313AB5 #B5AC31

analogous

#317CB5 #313AB5 #6A31B5

triadic

#313AB5 #B5313A #3AB531

tetradic

#313AB5 #B5317C #B5AC31 #31B56A

square

#313AB5 #B5317C #B5AC31 #31B56A

split-complementary

#313AB5 #B56A31 #7CB531

monochromatic

#171B55 #242B85 #313AB5 #535BD0 #8389DD

Accessibility & contrast

On white

8.74

#313AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#313AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313AB5

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313AB5	#FFFFFF	#000000	##FFFFFF
##313AB5	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B9

Deuteranopia (green-blind)

#0045B3

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313ab5;
/* rgb */ color: rgb(49, 58, 181);
/* oklch */ color: oklch(42.8% 0.191 272.0);

Tailwind

colors: {
  custom: {
    50: '#7d70cc',
    500: '#313ab5',
    950: '#000000',
  },
}

SCSS

$custom: #313ab5;
$custom-light: #7d70cc;
$custom-dark: #000000;

JSON

{
  "hex": "#313ab5",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 181
  },
  "hsl": {
    "h": 235.909,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.4281,
    "c": 0.19071,
    "h": 272
  },
  "luminance": 0.07015
}

Semantic roles & 50–950 ramp

primary

#313AB5

secondary

#C7C27B

accent

#D647E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #313AB5

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

Preview Lab → · Contrast checker → · Palette generator →