#311F97#311F97

#311F97 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.8% C 0.181 H 278.8°. Best body text is #FFFFFF at 11.84:1 contrast (WCAG AA passes).

Color values

HEX	#311F97
RGB	rgb(49, 31, 151)
HSL	hsl(249, 66%, 36%)
HSV	hsv(249, 79%, 59%)
CMYK	cmyk(67.5%, 79.5%, 0%, 40.8%)
CIE-LAB	lab(23.23, 43.85, -61.98)
CIE-LCH	lch(23.23, 75.92, 305.28°)
OKLab	oklab(35.76% 0.0278 -0.179)
OKLCH	oklch(35.76% 0.181 278.8)
XYZ	xyz(7.3407, 3.8667, 29.6317)
Luminance	0.0387 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F97 #85971F

analogous

#1F4997 #311F97 #6D1F97

triadic

#311F97 #97311F #1F9731

tetradic

#311F97 #971F49 #85971F #1F976D

square

#311F97 #971F49 #85971F #1F976D

split-complementary

#311F97 #976D1F #49971F

monochromatic

#100A31 #211564 #311F97 #4129CA #6954DC

Accessibility & contrast

On white

11.84

#311F97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#311F97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F97

11.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F97	#FFFFFF	#000000	##FFFFFF
##311F97	1.00	11.84	1.77	11.84
#FFFFFF	11.84	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9A

Deuteranopia (green-blind)

#003295

Tritanopia (blue-blind)

#00435B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311f97;
/* rgb */ color: rgb(49, 31, 151);
/* oklch */ color: oklch(35.8% 0.181 278.8);

Tailwind

colors: {
  custom: {
    50: '#785eb7',
    500: '#311f97',
    950: '#000000',
  },
}

SCSS

$custom: #311f97;
$custom-light: #785eb7;
$custom-dark: #000000;

JSON

{
  "hex": "#311f97",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 151
  },
  "hsl": {
    "h": 249,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.35761,
    "c": 0.18113,
    "h": 278.8
  },
  "luminance": 0.03867
}

Semantic roles & 50–950 ramp

primary

#311F97

secondary

#AFBF52

accent

#E93FCF

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0511

muted

#7C7980

Preview Lab

Preview with #311F97

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

Preview Lab → · Contrast checker → · Palette generator →