#2F309D#2F309D

#2F309D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.7% C 0.171 H 274.5°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#2F309D
RGB	rgb(47, 48, 157)
HSL	hsl(239, 54%, 40%)
HSV	hsv(239, 70%, 62%)
CMYK	cmyk(70.1%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(27.16, 35.90, -59.17)
CIE-LCH	lch(27.16, 69.21, 301.24°)
OKLab	oklab(38.7% 0.0134 -0.171)
OKLCH	oklch(38.7% 0.171 274.5)
XYZ	xyz(8.3130, 5.1518, 32.4480)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F309D #9D9C2F

analogous

#2F679D #2F309D #652F9D

triadic

#2F309D #9D2F30 #309D2F

tetradic

#2F309D #9D2F67 #9D9C2F #2F9D65

square

#2F309D #9D2F67 #9D9C2F #2F9D65

split-complementary

#2F309D #9D652F #679D2F

monochromatic

#13133F #21226E #2F309D #4344C7 #7273D5

Accessibility & contrast

On white

10.34

#2F309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#2F309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F309D

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F309D	#FFFFFF	#000000	##FFFFFF
##2F309D	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A0

Deuteranopia (green-blind)

#003B9B

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2f309d;
/* rgb */ color: rgb(47, 48, 157);
/* oklch */ color: oklch(38.7% 0.171 274.5);

Tailwind

colors: {
  custom: {
    50: '#7769bb',
    500: '#2f309d',
    950: '#000000',
  },
}

SCSS

$custom: #2f309d;
$custom-light: #7769bb;
$custom-dark: #000000;

JSON

{
  "hex": "#2f309d",
  "rgb": {
    "r": 47,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 239.455,
    "s": 53.922,
    "l": 40
  },
  "oklch": {
    "l": 0.38704,
    "c": 0.17149,
    "h": 274.5
  },
  "luminance": 0.05153
}

Semantic roles & 50–950 ramp

primary

#2F309D

secondary

#BCBC6B

accent

#DC4BDD

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2F309D

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

Preview Lab → · Contrast checker → · Palette generator →