#313B9D#313B9D

#313B9D is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.158 H 272.8°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#313B9D
RGB	rgb(49, 59, 157)
HSL	hsl(234, 52%, 40%)
HSV	hsv(234, 69%, 62%)
CMYK	cmyk(68.8%, 62.4%, 0%, 38.4%)
CIE-LAB	lab(29.95, 29.12, -54.61)
CIE-LCH	lch(29.95, 61.89, 298.07°)
OKLab	oklab(40.77% 0.0076 -0.1575)
OKLCH	oklch(40.77% 0.158 272.8)
XYZ	xyz(8.9144, 6.2144, 32.6215)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B9D #9D9331

analogous

#31719D #313B9D #5D319D

triadic

#313B9D #9D313B #3B9D31

tetradic

#313B9D #9D3171 #9D9331 #319D5D

square

#313B9D #9D3171 #9D9331 #319D5D

split-complementary

#313B9D #9D5D31 #719D31

monochromatic

#141840 #22296E #313B9D #4652C5 #757DD4

Accessibility & contrast

On white

9.36

#313B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#313B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B9D

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B9D	#FFFFFF	#000000	##FFFFFF
##313B9D	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA0

Deuteranopia (green-blind)

#00429B

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313b9d;
/* rgb */ color: rgb(49, 59, 157);
/* oklch */ color: oklch(40.8% 0.158 272.8);

Tailwind

colors: {
  custom: {
    50: '#7771bb',
    500: '#313b9d',
    950: '#000000',
  },
}

SCSS

$custom: #313b9d;
$custom-light: #7771bb;
$custom-dark: #000000;

JSON

{
  "hex": "#313b9d",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 157
  },
  "hsl": {
    "h": 234.444,
    "s": 52.427,
    "l": 40.392
  },
  "oklch": {
    "l": 0.4077,
    "c": 0.15766,
    "h": 272.8
  },
  "luminance": 0.06215
}

Semantic roles & 50–950 ramp

primary

#313B9D

secondary

#BCB56E

accent

#CF4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313B9D

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

Preview Lab → · Contrast checker → · Palette generator →