#312AB9#312AB9

#312AB9 is a dark, highly saturated blue. Relative luminance 0.058; OKLCH L 40.9% C 0.212 H 273.8°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#312AB9
RGB	rgb(49, 42, 185)
HSL	hsl(243, 63%, 45%)
HSV	hsv(243, 77%, 73%)
CMYK	cmyk(73.5%, 77.3%, 0%, 27.5%)
CIE-LAB	lab(28.93, 48.88, -73.08)
CIE-LCH	lch(28.93, 87.92, 303.77°)
OKLab	oklab(40.85% 0.0141 -0.2114)
OKLCH	oklch(40.85% 0.212 273.8)
XYZ	xyz(10.8486, 5.8106, 46.4393)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312AB9 #B2B92A

analogous

#2A6BB9 #312AB9 #792AB9

triadic

#312AB9 #B9312A #2AB931

tetradic

#312AB9 #B92A6B #B2B92A #2AB979

square

#312AB9 #B92A6B #B2B92A #2AB979

split-complementary

#312AB9 #B9792A #6BB92A

monochromatic

#171355 #241F87 #312AB9 #514AD6 #817CE1

Accessibility & contrast

On white

9.71

#312AB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#312AB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312AB9

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312AB9	#FFFFFF	#000000	##FFFFFF
##312AB9	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BBD

Deuteranopia (green-blind)

#003DB7

Tritanopia (blue-blind)

#005571

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #312ab9;
/* rgb */ color: rgb(49, 42, 185);
/* oklch */ color: oklch(40.9% 0.212 273.8);

Tailwind

colors: {
  custom: {
    50: '#7f66cf',
    500: '#312ab9',
    950: '#000000',
  },
}

SCSS

$custom: #312ab9;
$custom-light: #7f66cf;
$custom-dark: #000000;

JSON

{
  "hex": "#312ab9",
  "rgb": {
    "r": 49,
    "g": 42,
    "b": 185
  },
  "hsl": {
    "h": 242.937,
    "s": 62.996,
    "l": 44.51
  },
  "oklch": {
    "l": 0.40853,
    "c": 0.21189,
    "h": 273.8
  },
  "luminance": 0.05812
}

Semantic roles & 50–950 ramp

primary

#312AB9

secondary

#C5CA75

accent

#E642DE

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #312AB9

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

Preview Lab → · Contrast checker → · Palette generator →