#2F309B#2F309B

#2F309B is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.5% C 0.169 H 274.6°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#2F309B
RGB	rgb(47, 48, 155)
HSL	hsl(239, 53%, 40%)
HSV	hsv(239, 70%, 61%)
CMYK	cmyk(69.7%, 69%, 0%, 39.2%)
CIE-LAB	lab(26.97, 35.20, -58.26)
CIE-LCH	lch(26.97, 68.07, 301.14°)
OKLab	oklab(38.51% 0.0137 -0.1683)
OKLCH	oklch(38.51% 0.169 274.6)
XYZ	xyz(8.1437, 5.0840, 31.5561)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F309B #9B9A2F

analogous

#2F669B #2F309B #642F9B

triadic

#2F309B #9B2F30 #309B2F

tetradic

#2F309B #9B2F66 #9B9A2F #2F9B64

square

#2F309B #9B2F66 #9B9A2F #2F9B64

split-complementary

#2F309B #9B642F #669B2F

monochromatic

#13133D #21216C #2F309B #4243C6 #7172D4

Accessibility & contrast

On white

10.41

#2F309B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#2F309B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F309B

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F309B	#FFFFFF	#000000	##FFFFFF
##2F309B	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459E

Deuteranopia (green-blind)

#003B99

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2f309b;
/* rgb */ color: rgb(47, 48, 155);
/* oklch */ color: oklch(38.5% 0.169 274.6);

Tailwind

colors: {
  custom: {
    50: '#7769b9',
    500: '#2f309b',
    950: '#000000',
  },
}

SCSS

$custom: #2f309b;
$custom-light: #7769b9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f309b",
  "rgb": {
    "r": 47,
    "g": 48,
    "b": 155
  },
  "hsl": {
    "h": 239.444,
    "s": 53.465,
    "l": 39.608
  },
  "oklch": {
    "l": 0.38509,
    "c": 0.16887,
    "h": 274.6
  },
  "luminance": 0.05085
}

Semantic roles & 50–950 ramp

primary

#2F309B

secondary

#BBBB6A

accent

#DC4BDD

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2F309B

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

Preview Lab → · Contrast checker → · Palette generator →