#313D99#313D99

#313D99 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.150 H 272.3°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#313D99
RGB	rgb(49, 61, 153)
HSL	hsl(233, 51%, 40%)
HSV	hsv(233, 68%, 60%)
CMYK	cmyk(68%, 60.1%, 0%, 40%)
CIE-LAB	lab(30.13, 26.35, -51.88)
CIE-LCH	lch(30.13, 58.18, 296.93°)
OKLab	oklab(40.8% 0.006 -0.1494)
OKLCH	oklch(40.8% 0.15 272.3)
XYZ	xyz(8.6832, 6.2896, 30.8872)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D99 #998D31

analogous

#317199 #313D99 #593199

triadic

#313D99 #99313D #3D9931

tetradic

#313D99 #993171 #998D31 #319959

square

#313D99 #993171 #998D31 #319959

split-complementary

#313D99 #995931 #719931

monochromatic

#13183C #222B6B #313D99 #4453C3 #727DD2

Accessibility & contrast

On white

9.30

#313D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#313D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D99

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D99	#FFFFFF	#000000	##FFFFFF
##313D99	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004297

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313d99;
/* rgb */ color: rgb(49, 61, 153);
/* oklch */ color: oklch(40.8% 0.150 272.3);

Tailwind

colors: {
  custom: {
    50: '#7672b8',
    500: '#313d99',
    950: '#000000',
  },
}

SCSS

$custom: #313d99;
$custom-light: #7672b8;
$custom-dark: #000000;

JSON

{
  "hex": "#313d99",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 233.077,
    "s": 51.485,
    "l": 39.608
  },
  "oklch": {
    "l": 0.40804,
    "c": 0.14956,
    "h": 272.3
  },
  "luminance": 0.0629
}

Semantic roles & 50–950 ramp

primary

#313D99

secondary

#BAB16C

accent

#CB4DDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #313D99

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

Preview Lab → · Contrast checker → · Palette generator →