#313E81#313E81

#313E81 is a dark, moderate blue. Relative luminance 0.057; OKLCH L 39.1% C 0.113 H 271.9°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#313E81
RGB	rgb(49, 62, 129)
HSL	hsl(230, 45%, 35%)
HSV	hsv(230, 62%, 51%)
CMYK	cmyk(62%, 51.9%, 0%, 49.4%)
CIE-LAB	lab(28.60, 16.86, -39.56)
CIE-LCH	lch(28.60, 43.01, 293.08°)
OKLab	oklab(39.08% 0.0038 -0.1132)
OKLCH	oklch(39.08% 0.113 271.9)
XYZ	xyz(6.9504, 5.6826, 21.4952)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313E81 #817431

analogous

#316681 #313E81 #4C3181

triadic

#313E81 #81313E #3E8131

tetradic

#313E81 #813166 #817431 #31814C

square

#313E81 #813166 #817431 #31814C

split-complementary

#313E81 #814C31 #668131

monochromatic

#0F1328 #202955 #313E81 #4253AD #6776C5

Accessibility & contrast

On white

9.83

#313E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#313E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313E81

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313E81	#FFFFFF	#000000	##FFFFFF
##313E81	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4783

Deuteranopia (green-blind)

#094080

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313e81;
/* rgb */ color: rgb(49, 62, 129);
/* oklch */ color: oklch(39.1% 0.113 271.9);

Tailwind

colors: {
  custom: {
    50: '#7173a6',
    500: '#313e81',
    950: '#000000',
  },
}

SCSS

$custom: #313e81;
$custom-light: #7173a6;
$custom-dark: #000000;

JSON

{
  "hex": "#313e81",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 129
  },
  "hsl": {
    "h": 230.25,
    "s": 44.944,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39081,
    "c": 0.11327,
    "h": 271.9
  },
  "luminance": 0.05683
}

Semantic roles & 50–950 ramp

primary

#313E81

secondary

#ADA061

accent

#C053D5

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #313E81

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

Preview Lab → · Contrast checker → · Palette generator →