#311ABB#311ABB

#311ABB is a dark, highly saturated blue. Relative luminance 0.050; OKLCH L 39.4% C 0.226 H 274.8°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#311ABB
RGB	rgb(49, 26, 187)
HSL	hsl(249, 76%, 42%)
HSV	hsv(249, 86%, 73%)
CMYK	cmyk(73.8%, 86.1%, 0%, 26.7%)
CIE-LAB	lab(26.67, 56.76, -78.01)
CIE-LCH	lch(26.67, 96.47, 306.04°)
OKLab	oklab(39.36% 0.0189 -0.2254)
OKLCH	oklch(39.36% 0.226 274.8)
XYZ	xyz(10.6027, 4.9785, 47.4063)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311ABB #A4BB1A

analogous

#1A54BB #311ABB #811ABB

triadic

#311ABB #BB311A #1ABB31

tetradic

#311ABB #BB1A54 #A4BB1A #1ABB81

square

#311ABB #BB1A54 #A4BB1A #1ABB81

split-complementary

#311ABB #BB811A #54BB1A

monochromatic

#150B50 #231385 #311ABB #4930E2 #7966EA

Accessibility & contrast

On white

10.52

#311ABB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#311ABB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311ABB

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311ABB	#FFFFFF	#000000	##FFFFFF
##311ABB	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	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: #311abb;
/* rgb */ color: rgb(49, 26, 187);
/* oklch */ color: oklch(39.4% 0.226 274.8);

Tailwind

colors: {
  custom: {
    50: '#815ed1',
    500: '#311abb',
    950: '#000000',
  },
}

SCSS

$custom: #311abb;
$custom-light: #815ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#311abb",
  "rgb": {
    "r": 49,
    "g": 26,
    "b": 187
  },
  "hsl": {
    "h": 248.571,
    "s": 75.587,
    "l": 41.765
  },
  "oklch": {
    "l": 0.39357,
    "c": 0.22624,
    "h": 274.8
  },
  "luminance": 0.0498
}

Semantic roles & 50–950 ramp

primary

#311ABB

secondary

#BFCF62

accent

#F236D7

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #311ABB

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

Preview Lab → · Contrast checker → · Palette generator →