#311BBB#311BBB

#311BBB is a dark, highly saturated blue. Relative luminance 0.050; OKLCH L 39.4% C 0.226 H 274.7°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#311BBB
RGB	rgb(49, 27, 187)
HSL	hsl(248, 75%, 42%)
HSV	hsv(248, 86%, 73%)
CMYK	cmyk(73.8%, 85.6%, 0%, 26.7%)
CIE-LAB	lab(26.80, 56.37, -77.80)
CIE-LCH	lch(26.80, 96.07, 305.93°)
OKLab	oklab(39.45% 0.0187 -0.2248)
OKLCH	oklch(39.45% 0.226 274.7)
XYZ	xyz(10.6252, 5.0236, 47.4138)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311BBB #A5BB1B

analogous

#1B55BB #311BBB #811BBB

triadic

#311BBB #BB311B #1BBB31

tetradic

#311BBB #BB1B55 #A5BB1B #1BBB81

square

#311BBB #BB1B55 #A5BB1B #1BBB81

split-complementary

#311BBB #BB811B #55BB1B

monochromatic

#150C50 #231386 #311BBB #4A32E1 #7967E9

Accessibility & contrast

On white

10.47

#311BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#311BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311BBB

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311BBB	#FFFFFF	#000000	##FFFFFF
##311BBB	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046BF

Deuteranopia (green-blind)

#0038B8

Tritanopia (blue-blind)

#00506F

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #311bbb;
/* rgb */ color: rgb(49, 27, 187);
/* oklch */ color: oklch(39.4% 0.226 274.7);

Tailwind

colors: {
  custom: {
    50: '#815fd1',
    500: '#311bbb',
    950: '#000000',
  },
}

SCSS

$custom: #311bbb;
$custom-light: #815fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#311bbb",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 187
  },
  "hsl": {
    "h": 248.25,
    "s": 74.766,
    "l": 41.961
  },
  "oklch": {
    "l": 0.39445,
    "c": 0.22562,
    "h": 274.7
  },
  "luminance": 0.05025
}

Semantic roles & 50–950 ramp

primary

#311BBB

secondary

#C0CE63

accent

#F136D8

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #311BBB

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

Preview Lab → · Contrast checker → · Palette generator →