#313FB2#313FB2

#313FB2 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.181 H 271.2°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#313FB2
RGB	rgb(49, 63, 178)
HSL	hsl(233, 57%, 45%)
HSV	hsv(233, 72%, 70%)
CMYK	cmyk(72.5%, 64.6%, 0%, 30.2%)
CIE-LAB	lab(32.75, 34.11, -62.64)
CIE-LCH	lch(32.75, 71.33, 298.57°)
OKLab	oklab(43.39% 0.0036 -0.181)
OKLCH	oklch(43.39% 0.181 271.2)
XYZ	xyz(11.0773, 7.4212, 42.9595)
Luminance	0.0742 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FB2 #B2A431

analogous

#3180B2 #313FB2 #6331B2

triadic

#313FB2 #B2313F #3FB231

tetradic

#313FB2 #B23180 #B2A431 #31B263

square

#313FB2 #B23180 #B2A431 #31B263

split-complementary

#313FB2 #B26331 #80B231

monochromatic

#171D52 #242E82 #313FB2 #515FCF #818BDC

Accessibility & contrast

On white

8.45

#313FB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#313FB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FB2

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FB2	#FFFFFF	#000000	##FFFFFF
##313FB2	1.00	8.45	2.48	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B6

Deuteranopia (green-blind)

#0047B0

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313fb2;
/* rgb */ color: rgb(49, 63, 178);
/* oklch */ color: oklch(43.4% 0.181 271.2);

Tailwind

colors: {
  custom: {
    50: '#7c74ca',
    500: '#313fb2',
    950: '#000000',
  },
}

SCSS

$custom: #313fb2;
$custom-light: #7c74ca;
$custom-dark: #000000;

JSON

{
  "hex": "#313fb2",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 178
  },
  "hsl": {
    "h": 233.488,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43389,
    "c": 0.18105,
    "h": 271.2
  },
  "luminance": 0.07422
}

Semantic roles & 50–950 ramp

primary

#313FB2

secondary

#C5BD79

accent

#D048E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FB2

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

Preview Lab → · Contrast checker → · Palette generator →