#313FB0#313FB0

#313FB0 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.178 H 271.2°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#313FB0
RGB	rgb(49, 63, 176)
HSL	hsl(233, 56%, 44%)
HSV	hsv(233, 72%, 69%)
CMYK	cmyk(72.2%, 64.2%, 0%, 31%)
CIE-LAB	lab(32.57, 33.40, -61.74)
CIE-LCH	lch(32.57, 70.19, 298.41°)
OKLab	oklab(43.21% 0.0038 -0.1784)
OKLCH	oklch(43.21% 0.178 271.2)
XYZ	xyz(10.8779, 7.3415, 41.9096)
Luminance	0.0734 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.90

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FB0 #B0A231

analogous

#317FB0 #313FB0 #6331B0

triadic

#313FB0 #B0313F #3FB031

tetradic

#313FB0 #B0317F #B0A231 #31B063

square

#313FB0 #B0317F #B0A231 #31B063

split-complementary

#313FB0 #B06331 #7FB031

monochromatic

#161D50 #242E80 #313FB0 #505ECE #808ADC

Accessibility & contrast

On white

8.51

#313FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#313FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FB0

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FB0	#FFFFFF	#000000	##FFFFFF
##313FB0	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0047AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313fb0;
/* rgb */ color: rgb(49, 63, 176);
/* oklch */ color: oklch(43.2% 0.178 271.2);

Tailwind

colors: {
  custom: {
    50: '#7b74c9',
    500: '#313fb0',
    950: '#000000',
  },
}

SCSS

$custom: #313fb0;
$custom-light: #7b74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#313fb0",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 233.386,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43206,
    "c": 0.1784,
    "h": 271.2
  },
  "luminance": 0.07343
}

Semantic roles & 50–950 ramp

primary

#313FB0

secondary

#C5BC78

accent

#CF48E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FB0

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

Preview Lab → · Contrast checker → · Palette generator →