#313F8F#313F8F

#313F8F is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.4% C 0.133 H 271.7°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#313F8F
RGB	rgb(49, 63, 143)
HSL	hsl(231, 49%, 38%)
HSV	hsv(231, 66%, 56%)
CMYK	cmyk(65.7%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(29.89, 21.33, -46.15)
CIE-LCH	lch(29.89, 50.84, 294.81°)
OKLab	oklab(40.38% 0.0039 -0.1326)
OKLCH	oklch(40.38% 0.133 271.7)
XYZ	xyz(8.0004, 6.1905, 26.7545)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F8F #8F8131

analogous

#316E8F #313F8F #52318F

triadic

#313F8F #8F313F #3F8F31

tetradic

#313F8F #8F316E #8F8131 #318F52

square

#313F8F #8F316E #8F8131 #318F52

split-complementary

#313F8F #8F5231 #6E8F31

monochromatic

#121734 #212B61 #313F8F #4153BD #6D7CCD

Accessibility & contrast

On white

9.38

#313F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#313F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F8F

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F8F	#FFFFFF	#000000	##FFFFFF
##313F8F	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#024B92

Deuteranopia (green-blind)

#00428D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313f8f;
/* rgb */ color: rgb(49, 63, 143);
/* oklch */ color: oklch(40.4% 0.133 271.7);

Tailwind

colors: {
  custom: {
    50: '#7473b0',
    500: '#313f8f',
    950: '#000000',
  },
}

SCSS

$custom: #313f8f;
$custom-light: #7473b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313f8f",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 231.064,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40376,
    "c": 0.13264,
    "h": 271.7
  },
  "luminance": 0.06191
}

Semantic roles & 50–950 ramp

primary

#313F8F

secondary

#B5A967

accent

#C44FD9

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#090811

muted

#7B7B80

Preview Lab

Preview with #313F8F

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

Preview Lab → · Contrast checker → · Palette generator →