#313FAF#313FAF

#313FAF is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.177 H 271.2°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#313FAF
RGB	rgb(49, 63, 175)
HSL	hsl(233, 56%, 44%)
HSV	hsv(233, 72%, 69%)
CMYK	cmyk(72%, 64%, 0%, 31.4%)
CIE-LAB	lab(32.48, 33.04, -61.29)
CIE-LCH	lch(32.48, 69.62, 298.33°)
OKLab	oklab(43.11% 0.0038 -0.177)
OKLCH	oklch(43.11% 0.177 271.2)
XYZ	xyz(10.7794, 7.3020, 41.3905)
Luminance	0.0730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.01

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FAF #AFA131

analogous

#317EAF #313FAF #6231AF

triadic

#313FAF #AF313F #3FAF31

tetradic

#313FAF #AF317E #AFA131 #31AF62

square

#313FAF #AF317E #AFA131 #31AF62

split-complementary

#313FAF #AF6231 #7EAF31

monochromatic

#161D4F #242E7F #313FAF #4F5DCE #7F89DB

Accessibility & contrast

On white

8.53

#313FAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#313FAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FAF

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FAF	#FFFFFF	#000000	##FFFFFF
##313FAF	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B3

Deuteranopia (green-blind)

#0047AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313faf;
/* rgb */ color: rgb(49, 63, 175);
/* oklch */ color: oklch(43.1% 0.177 271.2);

Tailwind

colors: {
  custom: {
    50: '#7b74c8',
    500: '#313faf',
    950: '#000000',
  },
}

SCSS

$custom: #313faf;
$custom-light: #7b74c8;
$custom-dark: #000000;

JSON

{
  "hex": "#313faf",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 175
  },
  "hsl": {
    "h": 233.333,
    "s": 56.25,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43115,
    "c": 0.17708,
    "h": 271.2
  },
  "luminance": 0.07303
}

Semantic roles & 50–950 ramp

primary

#313FAF

secondary

#C4BC78

accent

#CF48E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FAF

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

Preview Lab → · Contrast checker → · Palette generator →