#2B309D#2B309D

#2B309D is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.5% C 0.173 H 272.9°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#2B309D
RGB	rgb(43, 48, 157)
HSL	hsl(237, 57%, 39%)
HSV	hsv(237, 73%, 62%)
CMYK	cmyk(72.6%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(26.91, 35.42, -59.60)
CIE-LCH	lch(26.91, 69.33, 300.72°)
OKLab	oklab(38.45% 0.0087 -0.1723)
OKLCH	oklch(38.45% 0.173 272.9)
XYZ	xyz(8.1370, 5.0610, 32.4398)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B309D #9D982B

analogous

#2B699D #2B309D #5F2B9D

triadic

#2B309D #9D2B30 #309D2B

tetradic

#2B309D #9D2B69 #9D982B #2B9D5F

square

#2B309D #9D2B69 #9D982B #2B9D5F

split-complementary

#2B309D #9D5F2B #699D2B

monochromatic

#11133D #1E216D #2B309D #3C42CA #6C70D7

Accessibility & contrast

On white

10.44

#2B309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#2B309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B309D

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B309D	#FFFFFF	#000000	##FFFFFF
##2B309D	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A0

Deuteranopia (green-blind)

#003A9B

Tritanopia (blue-blind)

#004E62

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2b309d;
/* rgb */ color: rgb(43, 48, 157);
/* oklch */ color: oklch(38.5% 0.173 272.9);

Tailwind

colors: {
  custom: {
    50: '#7669bb',
    500: '#2b309d',
    950: '#000000',
  },
}

SCSS

$custom: #2b309d;
$custom-light: #7669bb;
$custom-dark: #000000;

JSON

{
  "hex": "#2b309d",
  "rgb": {
    "r": 43,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 237.368,
    "s": 57,
    "l": 39.216
  },
  "oklch": {
    "l": 0.38452,
    "c": 0.17253,
    "h": 272.9
  },
  "luminance": 0.05062
}

Semantic roles & 50–950 ramp

primary

#2B309D

secondary

#BDBA66

accent

#DA48E0

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2B309D

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

Preview Lab → · Contrast checker → · Palette generator →