#3F487B#3F487B

#3F487B is a dark, moderate blue. Relative luminance 0.071; OKLCH L 41.9% C 0.086 H 274.5°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F487B
RGB	rgb(63, 72, 123)
HSL	hsl(231, 32%, 36%)
HSV	hsv(231, 49%, 48%)
CMYK	cmyk(48.8%, 41.5%, 0%, 51.8%)
CIE-LAB	lab(32.08, 11.34, -30.20)
CIE-LCH	lch(32.08, 32.26, 290.58°)
OKLab	oklab(41.87% 0.0068 -0.0853)
OKLCH	oklch(41.87% 0.086 274.5)
XYZ	xyz(7.9413, 7.1211, 19.6911)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F487B #7B723F

analogous

#3F667B #3F487B #543F7B

triadic

#3F487B #7B3F48 #487B3F

tetradic

#3F487B #7B3F66 #7B723F #3F7B54

square

#3F487B #7B3F66 #7B723F #3F7B54

split-complementary

#3F487B #7B543F #667B3F

monochromatic

#16192A #2A3053 #3F487B #5460A3 #7A83BB

Accessibility & contrast

On white

8.66

#3F487B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3F487B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F487B

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F487B	#FFFFFF	#000000	##FFFFFF
##3F487B	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354E7D

Deuteranopia (green-blind)

#2F497A

Tritanopia (blue-blind)

#29535B

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3f487b;
/* rgb */ color: rgb(63, 72, 123);
/* oklch */ color: oklch(41.9% 0.086 274.5);

Tailwind

colors: {
  custom: {
    50: '#787aa1',
    500: '#3f487b',
    950: '#000000',
  },
}

SCSS

$custom: #3f487b;
$custom-light: #787aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f487b",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 123
  },
  "hsl": {
    "h": 231,
    "s": 32.258,
    "l": 36.471
  },
  "oklch": {
    "l": 0.4187,
    "c": 0.08558,
    "h": 274.5
  },
  "luminance": 0.07122
}

Semantic roles & 50–950 ramp

primary

#3F487B

secondary

#A59D71

accent

#B95FC8

background

#F7F7F9

surface

#EDEDF2

border

#C8C8CC

text

#09090F

muted

#7B7B7E

Preview Lab

Preview with #3F487B

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

Preview Lab → · Contrast checker → · Palette generator →