#2B309C#2B309C

#2B309C is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.4% C 0.171 H 272.9°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#2B309C
RGB	rgb(43, 48, 156)
HSL	hsl(237, 57%, 39%)
HSV	hsv(237, 72%, 61%)
CMYK	cmyk(72.4%, 69.2%, 0%, 38.8%)
CIE-LAB	lab(26.81, 35.06, -59.15)
CIE-LCH	lch(26.81, 68.76, 300.66°)
OKLab	oklab(38.35% 0.0088 -0.171)
OKLCH	oklch(38.35% 0.171 272.9)
XYZ	xyz(8.0520, 5.0270, 31.9920)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B309C #9C972B

analogous

#2B699C #2B309C #5F2B9C

triadic

#2B309C #9C2B30 #309C2B

tetradic

#2B309C #9C2B69 #9C972B #2B9C5F

square

#2B309C #9C2B69 #9C972B #2B9C5F

split-complementary

#2B309C #9C5F2B #699C2B

monochromatic

#11123C #1E216C #2B309C #3B41C9 #6B70D6

Accessibility & contrast

On white

10.47

#2B309C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#2B309C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B309C

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B309C	#FFFFFF	#000000	##FFFFFF
##2B309C	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)

#00459F

Deuteranopia (green-blind)

#003A9A

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #2b309c;
/* rgb */ color: rgb(43, 48, 156);
/* oklch */ color: oklch(38.4% 0.171 272.9);

Tailwind

colors: {
  custom: {
    50: '#7569ba',
    500: '#2b309c',
    950: '#000000',
  },
}

SCSS

$custom: #2b309c;
$custom-light: #7569ba;
$custom-dark: #000000;

JSON

{
  "hex": "#2b309c",
  "rgb": {
    "r": 43,
    "g": 48,
    "b": 156
  },
  "hsl": {
    "h": 237.345,
    "s": 56.784,
    "l": 39.02
  },
  "oklch": {
    "l": 0.38353,
    "c": 0.17122,
    "h": 272.9
  },
  "luminance": 0.05028
}

Semantic roles & 50–950 ramp

primary

#2B309C

secondary

#BDB966

accent

#D948E0

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2B309C

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

Preview Lab → · Contrast checker → · Palette generator →