#311F90#311F90

#311F90 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.0% C 0.173 H 279.9°. Best body text is #FFFFFF at 12.14:1 contrast (WCAG AA passes).

Color values

HEX	#311F90
RGB	rgb(49, 31, 144)
HSL	hsl(250, 65%, 34%)
HSV	hsv(250, 78%, 56%)
CMYK	cmyk(66%, 78.5%, 0%, 43.5%)
CIE-LAB	lab(22.46, 41.66, -58.91)
CIE-LCH	lch(22.46, 72.15, 305.27°)
OKLab	oklab(35% 0.0297 -0.17)
OKLCH	oklch(35% 0.173 279.9)
XYZ	xyz(6.7890, 3.6460, 26.7261)
Luminance	0.0365 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F90 #7E901F

analogous

#1F4590 #311F90 #6A1F90

triadic

#311F90 #90311F #1F9031

tetradic

#311F90 #901F45 #7E901F #1F906A

square

#311F90 #901F45 #7E901F #1F906A

split-complementary

#311F90 #906A1F #45901F

monochromatic

#0F092B #20145E #311F90 #422AC2 #6650D9

Accessibility & contrast

On white

12.14

#311F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#311F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F90

12.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F90	#FFFFFF	#000000	##FFFFFF
##311F90	1.00	12.14	1.73	12.14
#FFFFFF	12.14	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A93

Deuteranopia (green-blind)

#00318E

Tritanopia (blue-blind)

#004057

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #311f90;
/* rgb */ color: rgb(49, 31, 144);
/* oklch */ color: oklch(35.0% 0.173 279.9);

Tailwind

colors: {
  custom: {
    50: '#775eb2',
    500: '#311f90',
    950: '#000000',
  },
}

SCSS

$custom: #311f90;
$custom-light: #775eb2;
$custom-dark: #000000;

JSON

{
  "hex": "#311f90",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 144
  },
  "hsl": {
    "h": 249.558,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.35003,
    "c": 0.17262,
    "h": 279.9
  },
  "luminance": 0.03647
}

Semantic roles & 50–950 ramp

primary

#311F90

secondary

#ABBC4E

accent

#E840CD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311F90

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

Preview Lab → · Contrast checker → · Palette generator →