#312AB3#312AB3

#312AB3 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.2% C 0.205 H 274.3°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#312AB3
RGB	rgb(49, 42, 179)
HSL	hsl(243, 62%, 43%)
HSV	hsv(243, 77%, 70%)
CMYK	cmyk(72.6%, 76.5%, 0%, 29.8%)
CIE-LAB	lab(28.28, 46.96, -70.59)
CIE-LCH	lch(28.28, 84.78, 303.64°)
OKLab	oklab(40.21% 0.0154 -0.2042)
OKLCH	oklch(40.21% 0.205 274.3)
XYZ	xyz(10.2286, 5.5626, 43.1737)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312AB3 #ACB32A

analogous

#2A67B3 #312AB3 #752AB3

triadic

#312AB3 #B3312A #2AB331

tetradic

#312AB3 #B32A67 #ACB32A #2AB375

square

#312AB3 #B32A67 #ACB32A #2AB375

split-complementary

#312AB3 #B3752A #67B32A

monochromatic

#161350 #231E81 #312AB3 #4E46D4 #7D78DF

Accessibility & contrast

On white

9.94

#312AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#312AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312AB3

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312AB3	#FFFFFF	#000000	##FFFFFF
##312AB3	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B7

Deuteranopia (green-blind)

#003CB1

Tritanopia (blue-blind)

#00536D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #312ab3;
/* rgb */ color: rgb(49, 42, 179);
/* oklch */ color: oklch(40.2% 0.205 274.3);

Tailwind

colors: {
  custom: {
    50: '#7e66cb',
    500: '#312ab3',
    950: '#000000',
  },
}

SCSS

$custom: #312ab3;
$custom-light: #7e66cb;
$custom-dark: #000000;

JSON

{
  "hex": "#312ab3",
  "rgb": {
    "r": 49,
    "g": 42,
    "b": 179
  },
  "hsl": {
    "h": 243.066,
    "s": 61.991,
    "l": 43.333
  },
  "oklch": {
    "l": 0.40205,
    "c": 0.20475,
    "h": 274.3
  },
  "luminance": 0.05564
}

Semantic roles & 50–950 ramp

primary

#312AB3

secondary

#C3C772

accent

#E543DD

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #312AB3

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

Preview Lab → · Contrast checker → · Palette generator →