#3F659D#3F659D

#3F659D is a mid, moderate blue. Relative luminance 0.128; OKLCH L 50.5% C 0.100 H 258.0°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F659D
RGB	rgb(63, 101, 157)
HSL	hsl(216, 43%, 43%)
HSV	hsv(216, 60%, 62%)
CMYK	cmyk(59.9%, 35.7%, 0%, 38.4%)
CIE-LAB	lab(42.46, 4.24, -34.48)
CIE-LCH	lch(42.46, 34.74, 277.00°)
OKLab	oklab(50.5% -0.0208 -0.0976)
OKLCH	oklch(50.5% 0.1 258)
XYZ	xyz(12.7872, 12.7973, 33.6880)
Luminance	0.1280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F659D #9D773F

analogous

#3F949D #3F659D #483F9D

triadic

#3F659D #9D3F65 #659D3F

tetradic

#3F659D #9D3F94 #9D773F #3F9D48

square

#3F659D #9D3F94 #9D773F #3F9D48

split-complementary

#3F659D #9D483F #949D3F

monochromatic

#1C2D46 #2D4971 #3F659D #5C83BD #87A4CF

Accessibility & contrast

On white

5.90

#3F659D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3F659D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F659D

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F659D	#FFFFFF	#000000	##FFFFFF
##3F659D	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E699F

Deuteranopia (green-blind)

#41609C

Tritanopia (blue-blind)

#007279

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f659d;
/* rgb */ color: rgb(63, 101, 157);
/* oklch */ color: oklch(50.5% 0.100 258.0);

Tailwind

colors: {
  custom: {
    50: '#7c90ba',
    500: '#3f659d',
    950: '#000000',
  },
}

SCSS

$custom: #3f659d;
$custom-light: #7c90ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f659d",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 157
  },
  "hsl": {
    "h": 215.745,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.50498,
    "c": 0.09976,
    "h": 258
  },
  "luminance": 0.12798
}

Semantic roles & 50–950 ramp

primary

#3F659D

secondary

#BAA27E

accent

#A055D3

background

#F7F8FB

surface

#EEF0F6

border

#C9CBD0

text

#0A0C11

muted

#7C7D80

Preview Lab

Preview with #3F659D

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

Preview Lab → · Contrast checker → · Palette generator →