#312AA5#312AA5

#312AA5 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.7% C 0.188 H 275.6°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#312AA5
RGB	rgb(49, 42, 165)
HSL	hsl(243, 59%, 41%)
HSV	hsv(243, 75%, 65%)
CMYK	cmyk(70.3%, 74.5%, 0%, 35.3%)
CIE-LAB	lab(26.80, 42.41, -64.61)
CIE-LCH	lch(26.80, 77.29, 303.28°)
OKLab	oklab(38.72% 0.0183 -0.1868)
OKLCH	oklch(38.72% 0.188 275.6)
XYZ	xyz(8.8839, 5.0247, 36.0917)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#312AA5 #9EA52A

analogous

#2A60A5 #312AA5 #6F2AA5

triadic

#312AA5 #A5312A #2AA531

tetradic

#312AA5 #A52A60 #9EA52A #2AA56F

square

#312AA5 #A52A60 #9EA52A #2AA56F

split-complementary

#312AA5 #A56F2A #60A52A

monochromatic

#141143 #231E74 #312AA5 #463ECE #756FDA

Accessibility & contrast

On white

10.47

#312AA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#312AA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #312AA5

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##312AA5	#FFFFFF	#000000	##FFFFFF
##312AA5	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A9

Deuteranopia (green-blind)

#003AA3

Tritanopia (blue-blind)

#004D65

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #312aa5;
/* rgb */ color: rgb(49, 42, 165);
/* oklch */ color: oklch(38.7% 0.188 275.6);

Tailwind

colors: {
  custom: {
    50: '#7a65c1',
    500: '#312aa5',
    950: '#000000',
  },
}

SCSS

$custom: #312aa5;
$custom-light: #7a65c1;
$custom-dark: #000000;

JSON

{
  "hex": "#312aa5",
  "rgb": {
    "r": 49,
    "g": 42,
    "b": 165
  },
  "hsl": {
    "h": 243.415,
    "s": 59.42,
    "l": 40.588
  },
  "oklch": {
    "l": 0.38724,
    "c": 0.18768,
    "h": 275.6
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#312AA5

secondary

#BCC169

accent

#E345DA

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #312AA5

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

Preview Lab → · Contrast checker → · Palette generator →