#313AB4#313AB4

#313AB4 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.189 H 272.0°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#313AB4
RGB	rgb(49, 58, 180)
HSL	hsl(236, 57%, 45%)
HSV	hsv(236, 73%, 71%)
CMYK	cmyk(72.8%, 67.8%, 0%, 29.4%)
CIE-LAB	lab(31.75, 37.97, -65.47)
CIE-LCH	lch(31.75, 75.69, 300.11°)
OKLab	oklab(42.71% 0.0067 -0.1893)
OKLCH	oklch(42.71% 0.189 272)
XYZ	xyz(11.0151, 6.9732, 43.9366)
Luminance	0.0697 (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

#313AB4 #B4AB31

analogous

#317BB4 #313AB4 #6A31B4

triadic

#313AB4 #B4313A #3AB431

tetradic

#313AB4 #B4317B #B4AB31 #31B46A

square

#313AB4 #B4317B #B4AB31 #31B46A

split-complementary

#313AB4 #B46A31 #7BB431

monochromatic

#171B54 #242A84 #313AB4 #525BD0 #8289DD

Accessibility & contrast

On white

8.77

#313AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#313AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313AB4

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313AB4	#FFFFFF	#000000	##FFFFFF
##313AB4	1.00	8.77	2.39	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313ab4;
/* rgb */ color: rgb(49, 58, 180);
/* oklch */ color: oklch(42.7% 0.189 272.0);

Tailwind

colors: {
  custom: {
    50: '#7c70cc',
    500: '#313ab4',
    950: '#000000',
  },
}

SCSS

$custom: #313ab4;
$custom-light: #7c70cc;
$custom-dark: #000000;

JSON

{
  "hex": "#313ab4",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 180
  },
  "hsl": {
    "h": 235.878,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42714,
    "c": 0.18944,
    "h": 272
  },
  "luminance": 0.06974
}

Semantic roles & 50–950 ramp

primary

#313AB4

secondary

#C6C17B

accent

#D647E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #313AB4

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

Preview Lab → · Contrast checker → · Palette generator →