#3F558E#3F558E

#3F558E is a mid, moderate blue. Relative luminance 0.095; OKLCH L 46.0% C 0.097 H 266.7°. Best body text is #FFFFFF at 7.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F558E
RGB	rgb(63, 85, 142)
HSL	hsl(223, 39%, 40%)
HSV	hsv(223, 56%, 56%)
CMYK	cmyk(55.6%, 40.1%, 0%, 44.3%)
CIE-LAB	lab(36.94, 9.25, -34.19)
CIE-LCH	lch(36.94, 35.42, 285.14°)
OKLab	oklab(45.96% -0.0056 -0.0969)
OKLCH	oklch(45.96% 0.097 266.7)
XYZ	xyz(10.1793, 9.5060, 26.8844)
Luminance	0.0951 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F558E #8E783F

analogous

#3F7D8E #3F558E #503F8E

triadic

#3F558E #8E3F55 #558E3F

tetradic

#3F558E #8E3F7D #8E783F #3F8E50

square

#3F558E #8E3F7D #8E783F #3F8E50

split-complementary

#3F558E #8E503F #7D8E3F

monochromatic

#192239 #2C3C64 #3F558E #5670B4 #8194C7

Accessibility & contrast

On white

7.24

#3F558E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F558E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F558E

7.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F558E	#FFFFFF	#000000	##FFFFFF
##3F558E	1.00	7.24	2.90	7.24
#FFFFFF	7.24	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5B90

Deuteranopia (green-blind)

#34548D

Tritanopia (blue-blind)

#14616A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f558e;
/* rgb */ color: rgb(63, 85, 142);
/* oklch */ color: oklch(46.0% 0.097 266.7);

Tailwind

colors: {
  custom: {
    50: '#7a84af',
    500: '#3f558e',
    950: '#000000',
  },
}

SCSS

$custom: #3f558e;
$custom-light: #7a84af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f558e",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 142
  },
  "hsl": {
    "h": 223.291,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.45957,
    "c": 0.09704,
    "h": 266.7
  },
  "luminance": 0.09507
}

Semantic roles & 50–950 ramp

primary

#3F558E

secondary

#B1A178

accent

#AE59CE

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#0A0A10

muted

#7C7C7F

Preview Lab

Preview with #3F558E

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

Preview Lab → · Contrast checker → · Palette generator →