#313B9C#313B9C

#313B9C is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.7% C 0.156 H 272.8°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#313B9C
RGB	rgb(49, 59, 156)
HSL	hsl(234, 52%, 40%)
HSV	hsv(234, 69%, 61%)
CMYK	cmyk(68.6%, 62.2%, 0%, 38.8%)
CIE-LAB	lab(29.86, 28.76, -54.14)
CIE-LCH	lch(29.86, 61.30, 297.98°)
OKLab	oklab(40.68% 0.0076 -0.1561)
OKLCH	oklch(40.68% 0.156 272.8)
XYZ	xyz(8.8293, 6.1804, 32.1737)
Luminance	0.0618 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B9C #9C9231

analogous

#31709C #313B9C #5D319C

triadic

#313B9C #9C313B #3B9C31

tetradic

#313B9C #9C3170 #9C9231 #319C5D

square

#313B9C #9C3170 #9C9231 #319C5D

split-complementary

#313B9C #9C5D31 #709C31

monochromatic

#14183F #22296D #313B9C #4551C5 #747DD3

Accessibility & contrast

On white

9.39

#313B9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#313B9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B9C

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B9C	#FFFFFF	#000000	##FFFFFF
##313B9C	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9F

Deuteranopia (green-blind)

#00429A

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313b9c;
/* rgb */ color: rgb(49, 59, 156);
/* oklch */ color: oklch(40.7% 0.156 272.8);

Tailwind

colors: {
  custom: {
    50: '#7771ba',
    500: '#313b9c',
    950: '#000000',
  },
}

SCSS

$custom: #313b9c;
$custom-light: #7771ba;
$custom-dark: #000000;

JSON

{
  "hex": "#313b9c",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 156
  },
  "hsl": {
    "h": 234.393,
    "s": 52.195,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40682,
    "c": 0.15629,
    "h": 272.8
  },
  "luminance": 0.06181
}

Semantic roles & 50–950 ramp

primary

#313B9C

secondary

#BBB46D

accent

#CE4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313B9C

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

Preview Lab → · Contrast checker → · Palette generator →