#2B309F#2B309F

#2B309F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.7% C 0.175 H 272.7°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#2B309F
RGB	rgb(43, 48, 159)
HSL	hsl(237, 57%, 40%)
HSV	hsv(237, 73%, 62%)
CMYK	cmyk(73%, 69.8%, 0%, 37.6%)
CIE-LAB	lab(27.10, 36.13, -60.50)
CIE-LCH	lch(27.10, 70.46, 300.84°)
OKLab	oklab(38.65% 0.0084 -0.1749)
OKLCH	oklch(38.65% 0.175 272.7)
XYZ	xyz(8.3091, 5.1299, 33.3464)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B309F #9F9A2B

analogous

#2B6A9F #2B309F #602B9F

triadic

#2B309F #9F2B30 #309F2B

tetradic

#2B309F #9F2B6A #9F9A2B #2B9F60

square

#2B309F #9F2B6A #9F9A2B #2B9F60

split-complementary

#2B309F #9F602B #6A9F2B

monochromatic

#11133F #1E216F #2B309F #3D43CA #6D72D7

Accessibility & contrast

On white

10.36

#2B309F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#2B309F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B309F

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B309F	#FFFFFF	#000000	##FFFFFF
##2B309F	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046A2

Deuteranopia (green-blind)

#003B9D

Tritanopia (blue-blind)

#004E63

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2b309f;
/* rgb */ color: rgb(43, 48, 159);
/* oklch */ color: oklch(38.7% 0.175 272.7);

Tailwind

colors: {
  custom: {
    50: '#7669bc',
    500: '#2b309f',
    950: '#000000',
  },
}

SCSS

$custom: #2b309f;
$custom-light: #7669bc;
$custom-dark: #000000;

JSON

{
  "hex": "#2b309f",
  "rgb": {
    "r": 43,
    "g": 48,
    "b": 159
  },
  "hsl": {
    "h": 237.414,
    "s": 57.426,
    "l": 39.608
  },
  "oklch": {
    "l": 0.38651,
    "c": 0.17514,
    "h": 272.7
  },
  "luminance": 0.05131
}

Semantic roles & 50–950 ramp

primary

#2B309F

secondary

#BEBB67

accent

#DA47E1

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2B309F

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

Preview Lab → · Contrast checker → · Palette generator →