#313B59#313B59

#313B59 is a dark, muted blue. Relative luminance 0.045; OKLCH L 35.7% C 0.054 H 269.5°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#313B59
RGB	rgb(49, 59, 89)
HSL	hsl(225, 29%, 27%)
HSV	hsv(225, 45%, 35%)
CMYK	cmyk(44.9%, 33.7%, 0%, 65.1%)
CIE-LAB	lab(25.27, 4.78, -19.31)
CIE-LCH	lch(25.27, 19.89, 283.90°)
OKLab	oklab(35.74% -0.0005 -0.054)
OKLCH	oklch(35.74% 0.054 269.5)
XYZ	xyz(4.6332, 4.5019, 10.0741)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B59 #594F31

analogous

#314F59 #313B59 #3B3159

triadic

#313B59 #59313B #3B5931

tetradic

#313B59 #59314F #594F31 #31593B

square

#313B59 #59314F #594F31 #31593B

split-complementary

#313B59 #593B31 #4F5931

monochromatic

#0B0D14 #1B2132 #313B59 #475580 #5E70A6

Accessibility & contrast

On white

11.05

#313B59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#313B59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B59

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B59	#FFFFFF	#000000	##FFFFFF
##313B59	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313E5A

Deuteranopia (green-blind)

#2D3A58

Tritanopia (blue-blind)

#244146

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #313b59;
/* rgb */ color: rgb(49, 59, 89);
/* oklch */ color: oklch(35.7% 0.054 269.5);

Tailwind

colors: {
  custom: {
    50: '#6b7088',
    500: '#313b59',
    950: '#000000',
  },
}

SCSS

$custom: #313b59;
$custom-light: #6b7088;
$custom-dark: #000000;

JSON

{
  "hex": "#313b59",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 89
  },
  "hsl": {
    "h": 225,
    "s": 28.986,
    "l": 27.059
  },
  "oklch": {
    "l": 0.3574,
    "c": 0.05402,
    "h": 269.5
  },
  "luminance": 0.04502
}

Semantic roles & 50–950 ramp

primary

#313B59

secondary

#8A7F5C

accent

#AD63C5

background

#F6F6F8

surface

#EBECEF

border

#C6C7CA

text

#07070B

muted

#7A7A7C

Preview Lab

Preview with #313B59

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

Preview Lab → · Contrast checker → · Palette generator →