#313FAA#313FAA

#313FAA is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.170 H 271.4°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#313FAA
RGB	rgb(49, 63, 170)
HSL	hsl(233, 55%, 43%)
HSV	hsv(233, 71%, 67%)
CMYK	cmyk(71.2%, 62.9%, 0%, 33.3%)
CIE-LAB	lab(32.05, 31.23, -59.00)
CIE-LCH	lch(32.05, 66.76, 297.89°)
OKLab	oklab(42.67% 0.004 -0.1703)
OKLCH	oklch(42.67% 0.17 271.4)
XYZ	xyz(10.2974, 7.1092, 38.8520)
Luminance	0.0711 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FAA #AA9C31

analogous

#317BAA #313FAA #5F31AA

triadic

#313FAA #AA313F #3FAA31

tetradic

#313FAA #AA317B #AA9C31 #31AA5F

square

#313FAA #AA317B #AA9C31 #31AA5F

split-complementary

#313FAA #AA5F31 #7BAA31

monochromatic

#161C4B #232D7A #313FAA #4D5BCC #7C87D9

Accessibility & contrast

On white

8.67

#313FAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#313FAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FAA

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FAA	#FFFFFF	#000000	##FFFFFF
##313FAA	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AD

Deuteranopia (green-blind)

#0046A8

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313faa;
/* rgb */ color: rgb(49, 63, 170);
/* oklch */ color: oklch(42.7% 0.170 271.4);

Tailwind

colors: {
  custom: {
    50: '#7a74c4',
    500: '#313faa',
    950: '#000000',
  },
}

SCSS

$custom: #313faa;
$custom-light: #7a74c4;
$custom-dark: #000000;

JSON

{
  "hex": "#313faa",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 170
  },
  "hsl": {
    "h": 233.058,
    "s": 55.251,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42665,
    "c": 0.1704,
    "h": 271.4
  },
  "luminance": 0.0711
}

Semantic roles & 50–950 ramp

primary

#313FAA

secondary

#C2B975

accent

#CD49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #313FAA

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

Preview Lab → · Contrast checker → · Palette generator →