#313B87#313B87

#313B87 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.9% C 0.126 H 273.4°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#313B87
RGB	rgb(49, 59, 135)
HSL	hsl(233, 47%, 36%)
HSV	hsv(233, 64%, 53%)
CMYK	cmyk(63.7%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(28.19, 21.09, -43.95)
CIE-LCH	lch(28.19, 48.75, 295.64°)
OKLab	oklab(38.92% 0.0075 -0.1262)
OKLCH	oklch(38.92% 0.126 273.4)
XYZ	xyz(7.2023, 5.5296, 23.6047)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B87 #877D31

analogous

#316687 #313B87 #523187

triadic

#313B87 #87313B #3B8731

tetradic

#313B87 #873166 #877D31 #318752

square

#313B87 #873166 #877D31 #318752

split-complementary

#313B87 #875231 #668731

monochromatic

#10142D #21275A #313B87 #414FB4 #6A75C9

Accessibility & contrast

On white

9.97

#313B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#313B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B87

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B87	#FFFFFF	#000000	##FFFFFF
##313B87	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04468A

Deuteranopia (green-blind)

#003F85

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313b87;
/* rgb */ color: rgb(49, 59, 135);
/* oklch */ color: oklch(38.9% 0.126 273.4);

Tailwind

colors: {
  custom: {
    50: '#7370ab',
    500: '#313b87',
    950: '#000000',
  },
}

SCSS

$custom: #313b87;
$custom-light: #7370ab;
$custom-dark: #000000;

JSON

{
  "hex": "#313b87",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 233.023,
    "s": 46.739,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38916,
    "c": 0.12638,
    "h": 273.4
  },
  "luminance": 0.0553
}

Semantic roles & 50–950 ramp

primary

#313B87

secondary

#B0A764

accent

#C751D6

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B87

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

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