#313C9B#313C9B

#313C9B is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.154 H 272.5°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#313C9B
RGB	rgb(49, 60, 155)
HSL	hsl(234, 52%, 40%)
HSV	hsv(234, 68%, 61%)
CMYK	cmyk(68.4%, 61.3%, 0%, 39.2%)
CIE-LAB	lab(30.04, 27.74, -53.25)
CIE-LCH	lch(30.04, 60.04, 297.52°)
OKLab	oklab(40.78% 0.0068 -0.1535)
OKLCH	oklch(40.78% 0.154 272.5)
XYZ	xyz(8.7969, 6.2504, 31.7469)
Luminance	0.0625 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C9B #9B9031

analogous

#31719B #313C9B #5B319B

triadic

#313C9B #9B313C #3C9B31

tetradic

#313C9B #9B3171 #9B9031 #319B5B

square

#313C9B #9B3171 #9B9031 #319B5B

split-complementary

#313C9B #9B5B31 #719B31

monochromatic

#14183E #222A6D #313C9B #4552C4 #737DD3

Accessibility & contrast

On white

9.33

#313C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#313C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C9B

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C9B	#FFFFFF	#000000	##FFFFFF
##313C9B	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004299

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313c9b;
/* rgb */ color: rgb(49, 60, 155);
/* oklch */ color: oklch(40.8% 0.154 272.5);

Tailwind

colors: {
  custom: {
    50: '#7771b9',
    500: '#313c9b',
    950: '#000000',
  },
}

SCSS

$custom: #313c9b;
$custom-light: #7771b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313c9b",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 155
  },
  "hsl": {
    "h": 233.774,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.40784,
    "c": 0.15363,
    "h": 272.5
  },
  "luminance": 0.06251
}

Semantic roles & 50–950 ramp

primary

#313C9B

secondary

#BBB36D

accent

#CD4CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313C9B

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

Preview Lab → · Contrast checker → · Palette generator →