#311FAD#311FAD

#311FAD is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.2% C 0.207 H 276.0°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#311FAD
RGB	rgb(49, 31, 173)
HSL	hsl(248, 70%, 40%)
HSV	hsv(248, 82%, 68%)
CMYK	cmyk(71.7%, 82.1%, 0%, 32.2%)
CIE-LAB	lab(25.71, 50.59, -71.25)
CIE-LCH	lch(25.71, 87.38, 305.38°)
OKLab	oklab(38.22% 0.0215 -0.2059)
OKLCH	oklch(38.22% 0.207 276)
XYZ	xyz(9.2970, 4.6492, 39.9345)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FAD #9BAD1F

analogous

#1F54AD #311FAD #781FAD

triadic

#311FAD #AD311F #1FAD31

tetradic

#311FAD #AD1F54 #9BAD1F #1FAD78

square

#311FAD #AD1F54 #9BAD1F #1FAD78

split-complementary

#311FAD #AD781F #54AD1F

monochromatic

#140C45 #221679 #311FAD #452FDA #7463E3

Accessibility & contrast

On white

10.88

#311FAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#311FAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FAD

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FAD	#FFFFFF	#000000	##FFFFFF
##311FAD	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B1

Deuteranopia (green-blind)

#0037AB

Tritanopia (blue-blind)

#004C67

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #311fad;
/* rgb */ color: rgb(49, 31, 173);
/* oklch */ color: oklch(38.2% 0.207 276.0);

Tailwind

colors: {
  custom: {
    50: '#7d60c7',
    500: '#311fad',
    950: '#000000',
  },
}

SCSS

$custom: #311fad;
$custom-light: #7d60c7;
$custom-dark: #000000;

JSON

{
  "hex": "#311fad",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 173
  },
  "hsl": {
    "h": 247.606,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.38216,
    "c": 0.20706,
    "h": 276
  },
  "luminance": 0.0465
}

Semantic roles & 50–950 ramp

primary

#311FAD

secondary

#BBC860

accent

#EC3BD6

background

#F8F5FC

surface

#F0EAF8

border

#CBC6D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #311FAD

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

Preview Lab → · Contrast checker → · Palette generator →