#312BA5#312BA5

#312BA5 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.9% C 0.187 H 275.5°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#312BA5
RGB	rgb(49, 43, 165)
HSL	hsl(243, 59%, 41%)
HSV	hsv(243, 74%, 65%)
CMYK	cmyk(70.3%, 73.9%, 0%, 35.3%)
CIE-LAB	lab(27.01, 41.84, -64.28)
CIE-LCH	lch(27.01, 76.69, 303.06°)
OKLab	oklab(38.87% 0.0178 -0.1858)
OKLCH	oklch(38.87% 0.187 275.5)
XYZ	xyz(8.9198, 5.0965, 36.1037)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312BA5 #9FA52B

analogous

#2B62A5 #312BA5 #6E2BA5

triadic

#312BA5 #A5312B #2BA531

tetradic

#312BA5 #A52B62 #9FA52B #2BA56E

square

#312BA5 #A52B62 #9FA52B #2BA56E

split-complementary

#312BA5 #A56E2B #62A52B

monochromatic

#141244 #231E74 #312BA5 #4740CD #7671DA

Accessibility & contrast

On white

10.40

#312BA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#312BA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312BA5

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312BA5	#FFFFFF	#000000	##FFFFFF
##312BA5	1.00	10.40	2.02	10.40
#FFFFFF	10.40	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A9

Deuteranopia (green-blind)

#003AA3

Tritanopia (blue-blind)

#004E65

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #312ba5;
/* rgb */ color: rgb(49, 43, 165);
/* oklch */ color: oklch(38.9% 0.187 275.5);

Tailwind

colors: {
  custom: {
    50: '#7a66c1',
    500: '#312ba5',
    950: '#000000',
  },
}

SCSS

$custom: #312ba5;
$custom-light: #7a66c1;
$custom-dark: #000000;

JSON

{
  "hex": "#312ba5",
  "rgb": {
    "r": 49,
    "g": 43,
    "b": 165
  },
  "hsl": {
    "h": 242.951,
    "s": 58.654,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38868,
    "c": 0.18666,
    "h": 275.5
  },
  "luminance": 0.05097
}

Semantic roles & 50–950 ramp

primary

#312BA5

secondary

#BDC16B

accent

#E246DA

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #312BA5

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

Preview Lab → · Contrast checker → · Palette generator →