#311AB3#311AB3

#311AB3 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.4% C 0.217 H 275.6°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#311AB3
RGB	rgb(49, 26, 179)
HSL	hsl(249, 75%, 40%)
HSV	hsv(249, 85%, 70%)
CMYK	cmyk(72.6%, 85.5%, 0%, 29.8%)
CIE-LAB	lab(25.70, 54.48, -74.86)
CIE-LCH	lch(25.70, 92.59, 306.04°)
OKLab	oklab(38.41% 0.0214 -0.2163)
OKLCH	oklch(38.41% 0.217 275.6)
XYZ	xyz(9.7700, 4.6455, 43.0209)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311AB3 #9CB31A

analogous

#1A4FB3 #311AB3 #7E1AB3

triadic

#311AB3 #B3311A #1AB331

tetradic

#311AB3 #B31A4F #9CB31A #1AB37E

square

#311AB3 #B31A4F #9CB31A #1AB37E

split-complementary

#311AB3 #B37E1A #4FB31A

monochromatic

#140A48 #22127E #311AB3 #452AE0 #7460E8

Accessibility & contrast

On white

10.89

#311AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#311AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311AB3

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311AB3	#FFFFFF	#000000	##FFFFFF
##311AB3	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0036B0

Tritanopia (blue-blind)

#004D6A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #311ab3;
/* rgb */ color: rgb(49, 26, 179);
/* oklch */ color: oklch(38.4% 0.217 275.6);

Tailwind

colors: {
  custom: {
    50: '#7f5ecb',
    500: '#311ab3',
    950: '#000000',
  },
}

SCSS

$custom: #311ab3;
$custom-light: #7f5ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#311ab3",
  "rgb": {
    "r": 49,
    "g": 26,
    "b": 179
  },
  "hsl": {
    "h": 249.02,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.38413,
    "c": 0.21738,
    "h": 275.6
  },
  "luminance": 0.04646
}

Semantic roles & 50–950 ramp

primary

#311AB3

secondary

#BBCC5D

accent

#F137D5

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #311AB3

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

Preview Lab → · Contrast checker → · Palette generator →