#313B9A#313B9A

#313B9A is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.5% C 0.154 H 272.9°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#313B9A
RGB	rgb(49, 59, 154)
HSL	hsl(234, 52%, 40%)
HSV	hsv(234, 68%, 60%)
CMYK	cmyk(68.2%, 61.7%, 0%, 39.6%)
CIE-LAB	lab(29.70, 28.04, -53.19)
CIE-LCH	lch(29.70, 60.13, 297.79°)
OKLab	oklab(40.51% 0.0077 -0.1533)
OKLCH	oklch(40.51% 0.154 272.9)
XYZ	xyz(8.6614, 6.1132, 31.2891)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B9A #9A9031

analogous

#316F9A #313B9A #5C319A

triadic

#313B9A #9A313B #3B9A31

tetradic

#313B9A #9A316F #9A9031 #319A5C

square

#313B9A #9A316F #9A9031 #319A5C

split-complementary

#313B9A #9A5C31 #6F9A31

monochromatic

#13173D #22296C #313B9A #4551C4 #737CD2

Accessibility & contrast

On white

9.45

#313B9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#313B9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B9A

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B9A	#FFFFFF	#000000	##FFFFFF
##313B9A	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9D

Deuteranopia (green-blind)

#004198

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313b9a;
/* rgb */ color: rgb(49, 59, 154);
/* oklch */ color: oklch(40.5% 0.154 272.9);

Tailwind

colors: {
  custom: {
    50: '#7771b9',
    500: '#313b9a',
    950: '#000000',
  },
}

SCSS

$custom: #313b9a;
$custom-light: #7771b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313b9a",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 154
  },
  "hsl": {
    "h": 234.286,
    "s": 51.724,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40507,
    "c": 0.15352,
    "h": 272.9
  },
  "luminance": 0.06114
}

Semantic roles & 50–950 ramp

primary

#313B9A

secondary

#BAB36C

accent

#CE4DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #313B9A

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

Preview Lab → · Contrast checker → · Palette generator →