#2B309E#2B309E

#2B309E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.6% C 0.174 H 272.8°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#2B309E
RGB	rgb(43, 48, 158)
HSL	hsl(237, 57%, 39%)
HSV	hsv(237, 73%, 62%)
CMYK	cmyk(72.8%, 69.6%, 0%, 38%)
CIE-LAB	lab(27.00, 35.77, -60.05)
CIE-LCH	lch(27.00, 69.90, 300.78°)
OKLab	oklab(38.55% 0.0085 -0.1736)
OKLCH	oklch(38.55% 0.174 272.8)
XYZ	xyz(8.2227, 5.0953, 32.8913)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B309E #9E992B

analogous

#2B6A9E #2B309E #5F2B9E

triadic

#2B309E #9E2B30 #309E2B

tetradic

#2B309E #9E2B6A #9E992B #2B9E5F

square

#2B309E #9E2B6A #9E992B #2B9E5F

split-complementary

#2B309E #9E5F2B #6A9E2B

monochromatic

#11133E #1E216E #2B309E #3C42CA #6C71D7

Accessibility & contrast

On white

10.40

#2B309E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#2B309E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B309E

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B309E	#FFFFFF	#000000	##FFFFFF
##2B309E	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)

#0045A1

Deuteranopia (green-blind)

#003A9C

Tritanopia (blue-blind)

#004E63

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2b309e;
/* rgb */ color: rgb(43, 48, 158);
/* oklch */ color: oklch(38.6% 0.174 272.8);

Tailwind

colors: {
  custom: {
    50: '#7669bc',
    500: '#2b309e',
    950: '#000000',
  },
}

SCSS

$custom: #2b309e;
$custom-light: #7669bc;
$custom-dark: #000000;

JSON

{
  "hex": "#2b309e",
  "rgb": {
    "r": 43,
    "g": 48,
    "b": 158
  },
  "hsl": {
    "h": 237.391,
    "s": 57.214,
    "l": 39.412
  },
  "oklch": {
    "l": 0.38552,
    "c": 0.17384,
    "h": 272.8
  },
  "luminance": 0.05096
}

Semantic roles & 50–950 ramp

primary

#2B309E

secondary

#BEBA67

accent

#DA47E0

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2B309E

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

Preview Lab → · Contrast checker → · Palette generator →