#3F347B#3F347B

#3F347B is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.7% C 0.116 H 286.5°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#3F347B
RGB	rgb(63, 52, 123)
HSL	hsl(249, 41%, 34%)
HSV	hsv(249, 58%, 48%)
CMYK	cmyk(48.8%, 57.7%, 0%, 51.8%)
CIE-LAB	lab(26.57, 24.60, -39.00)
CIE-LCH	lch(26.57, 46.12, 302.24°)
OKLab	oklab(37.71% 0.033 -0.1112)
OKLCH	oklch(37.71% 0.116 286.5)
XYZ	xyz(6.8520, 4.9425, 19.3280)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F347B #707B34

analogous

#344D7B #3F347B #63347B

triadic

#3F347B #7B3F34 #347B3F

tetradic

#3F347B #7B344D #707B34 #347B63

square

#3F347B #7B344D #707B34 #347B63

split-complementary

#3F347B #7B6334 #4D7B34

monochromatic

#131025 #292250 #3F347B #5546A6 #776AC0

Accessibility & contrast

On white

10.56

#3F347B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#3F347B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F347B

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F347B	#FFFFFF	#000000	##FFFFFF
##3F347B	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A417D

Deuteranopia (green-blind)

#093D79

Tritanopia (blue-blind)

#2B4452

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3f347b;
/* rgb */ color: rgb(63, 52, 123);
/* oklch */ color: oklch(37.7% 0.116 286.5);

Tailwind

colors: {
  custom: {
    50: '#796ca2',
    500: '#3f347b',
    950: '#000000',
  },
}

SCSS

$custom: #3f347b;
$custom-light: #796ca2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f347b",
  "rgb": {
    "r": 63,
    "g": 52,
    "b": 123
  },
  "hsl": {
    "h": 249.296,
    "s": 40.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.37709,
    "c": 0.11605,
    "h": 286.5
  },
  "luminance": 0.04943
}

Semantic roles & 50–950 ramp

primary

#3F347B

secondary

#9DA863

accent

#D057BE

background

#F7F6FA

surface

#EEEBF3

border

#C9C6CD

text

#09070F

muted

#7B7A7F

Preview Lab

Preview with #3F347B

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

Preview Lab → · Contrast checker → · Palette generator →