#3F487D#3F487D

#3F487D is a dark, moderate blue. Relative luminance 0.072; OKLCH L 42.0% C 0.089 H 274.7°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F487D
RGB	rgb(63, 72, 125)
HSL	hsl(231, 33%, 37%)
HSV	hsv(231, 50%, 49%)
CMYK	cmyk(49.6%, 42.4%, 0%, 51%)
CIE-LAB	lab(32.19, 12.00, -31.27)
CIE-LCH	lch(32.19, 33.49, 291.00°)
OKLab	oklab(41.99% 0.0072 -0.0884)
OKLCH	oklch(41.99% 0.089 274.7)
XYZ	xyz(8.0678, 7.1717, 20.3572)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F487D #7D743F

analogous

#3F677D #3F487D #553F7D

triadic

#3F487D #7D3F48 #487D3F

tetradic

#3F487D #7D3F67 #7D743F #3F7D55

square

#3F487D #7D3F67 #7D743F #3F7D55

split-complementary

#3F487D #7D553F #677D3F

monochromatic

#16192C #2A3154 #3F487D #545FA6 #7A84BC

Accessibility & contrast

On white

8.63

#3F487D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3F487D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F487D

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F487D	#FFFFFF	#000000	##FFFFFF
##3F487D	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#344E7F

Deuteranopia (green-blind)

#2E497C

Tritanopia (blue-blind)

#28535C

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f487d;
/* rgb */ color: rgb(63, 72, 125);
/* oklch */ color: oklch(42.0% 0.089 274.7);

Tailwind

colors: {
  custom: {
    50: '#787aa3',
    500: '#3f487d',
    950: '#000000',
  },
}

SCSS

$custom: #3f487d;
$custom-light: #787aa3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f487d",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 125
  },
  "hsl": {
    "h": 231.29,
    "s": 32.979,
    "l": 36.863
  },
  "oklch": {
    "l": 0.41994,
    "c": 0.08872,
    "h": 274.7
  },
  "luminance": 0.07172
}

Semantic roles & 50–950 ramp

primary

#3F487D

secondary

#A69F71

accent

#BA5FC9

background

#F7F7FA

surface

#EDEDF3

border

#C8C8CD

text

#09090F

muted

#7B7B7F

Preview Lab

Preview with #3F487D

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

Preview Lab → · Contrast checker → · Palette generator →