#313A8F#313A8F

#313A8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.139 H 273.6°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#313A8F
RGB	rgb(49, 58, 143)
HSL	hsl(234, 49%, 38%)
HSV	hsv(234, 66%, 56%)
CMYK	cmyk(65.7%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(28.54, 24.69, -48.33)
CIE-LCH	lch(28.54, 54.28, 297.06°)
OKLab	oklab(39.37% 0.0087 -0.1391)
OKLCH	oklch(39.37% 0.139 273.6)
XYZ	xyz(7.7360, 5.6616, 26.6664)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A8F #8F8631

analogous

#31698F #313A8F #57318F

triadic

#313A8F #8F313A #3A8F31

tetradic

#313A8F #8F3169 #8F8631 #318F57

square

#313A8F #8F3169 #8F8631 #318F57

split-complementary

#313A8F #8F5731 #698F31

monochromatic

#121534 #212861 #313A8F #414CBD #6D76CD

Accessibility & contrast

On white

9.85

#313A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#313A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A8F

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A8F	#FFFFFF	#000000	##FFFFFF
##313A8F	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313a8f;
/* rgb */ color: rgb(49, 58, 143);
/* oklch */ color: oklch(39.4% 0.139 273.6);

Tailwind

colors: {
  custom: {
    50: '#7470b0',
    500: '#313a8f',
    950: '#000000',
  },
}

SCSS

$custom: #313a8f;
$custom-light: #7470b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313a8f",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 234.255,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.39371,
    "c": 0.13933,
    "h": 273.6
  },
  "luminance": 0.05662
}

Semantic roles & 50–950 ramp

primary

#313A8F

secondary

#B5AD67

accent

#CB4FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #313A8F

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

Preview Lab → · Contrast checker → · Palette generator →