#313B9F#313B9F

#313B9F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.9% C 0.160 H 272.7°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#313B9F
RGB	rgb(49, 59, 159)
HSL	hsl(235, 53%, 41%)
HSV	hsv(235, 69%, 62%)
CMYK	cmyk(69.2%, 62.9%, 0%, 37.6%)
CIE-LAB	lab(30.12, 29.85, -55.55)
CIE-LCH	lch(30.12, 63.06, 298.25°)
OKLab	oklab(40.95% 0.0075 -0.1602)
OKLCH	oklch(40.95% 0.16 272.7)
XYZ	xyz(9.0865, 6.2832, 33.5281)
Luminance	0.0628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B9F #9F9531

analogous

#31729F #313B9F #5E319F

triadic

#313B9F #9F313B #3B9F31

tetradic

#313B9F #9F3172 #9F9531 #319F5E

square

#313B9F #9F3172 #9F9531 #319F5E

split-complementary

#313B9F #9F5E31 #729F31

monochromatic

#141841 #232A70 #313B9F #4753C6 #767ED5

Accessibility & contrast

On white

9.31

#313B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#313B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B9F

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B9F	#FFFFFF	#000000	##FFFFFF
##313B9F	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005467

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313b9f;
/* rgb */ color: rgb(49, 59, 159);
/* oklch */ color: oklch(40.9% 0.160 272.7);

Tailwind

colors: {
  custom: {
    50: '#7871bc',
    500: '#313b9f',
    950: '#000000',
  },
}

SCSS

$custom: #313b9f;
$custom-light: #7871bc;
$custom-dark: #000000;

JSON

{
  "hex": "#313b9f",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 159
  },
  "hsl": {
    "h": 234.545,
    "s": 52.885,
    "l": 40.784
  },
  "oklch": {
    "l": 0.40947,
    "c": 0.16041,
    "h": 272.7
  },
  "luminance": 0.06284
}

Semantic roles & 50–950 ramp

primary

#313B9F

secondary

#BDB66F

accent

#CF4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313B9F

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

Preview Lab → · Contrast checker → · Palette generator →