#3F558C#3F558C

#3F558C is a mid, moderate blue. Relative luminance 0.094; OKLCH L 45.8% C 0.094 H 266.3°. Best body text is #FFFFFF at 7.27:1 contrast (WCAG AA passes).

Color values

HEX	#3F558C
RGB	rgb(63, 85, 140)
HSL	hsl(223, 38%, 40%)
HSV	hsv(223, 55%, 55%)
CMYK	cmyk(55%, 39.3%, 0%, 45.1%)
CIE-LAB	lab(36.83, 8.57, -33.15)
CIE-LCH	lch(36.83, 34.24, 284.49°)
OKLab	oklab(45.84% -0.0061 -0.0938)
OKLCH	oklch(45.84% 0.094 266.3)
XYZ	xyz(10.0304, 9.4465, 26.1007)
Luminance	0.0945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F558C #8C763F

analogous

#3F7C8C #3F558C #4F3F8C

triadic

#3F558C #8C3F55 #558C3F

tetradic

#3F558C #8C3F7C #8C763F #3F8C4F

square

#3F558C #8C3F7C #8C763F #3F8C4F

split-complementary

#3F558C #8C4F3F #7C8C3F

monochromatic

#192238 #2C3B62 #3F558C #5570B3 #8094C6

Accessibility & contrast

On white

7.27

#3F558C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#3F558C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F558C

7.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F558C	#FFFFFF	#000000	##FFFFFF
##3F558C	1.00	7.27	2.89	7.27
#FFFFFF	7.27	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5A8E

Deuteranopia (green-blind)

#36538B

Tritanopia (blue-blind)

#17616A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f558c;
/* rgb */ color: rgb(63, 85, 140);
/* oklch */ color: oklch(45.8% 0.094 266.3);

Tailwind

colors: {
  custom: {
    50: '#7a84ae',
    500: '#3f558c',
    950: '#000000',
  },
}

SCSS

$custom: #3f558c;
$custom-light: #7a84ae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f558c",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 140
  },
  "hsl": {
    "h": 222.857,
    "s": 37.931,
    "l": 39.804
  },
  "oklch": {
    "l": 0.45835,
    "c": 0.09404,
    "h": 266.3
  },
  "luminance": 0.09447
}

Semantic roles & 50–950 ramp

primary

#3F558C

secondary

#B0A077

accent

#AD5ACE

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #3F558C

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

Preview Lab → · Contrast checker → · Palette generator →