#3F577E#3F577E

#3F577E is a mid, moderate blue. Relative luminance 0.094; OKLCH L 45.5% C 0.071 H 259.8°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F577E
RGB	rgb(63, 87, 126)
HSL	hsl(217, 33%, 37%)
HSV	hsv(217, 50%, 49%)
CMYK	cmyk(50%, 31%, 0%, 50.6%)
CIE-LAB	lab(36.70, 2.59, -24.79)
CIE-LCH	lch(36.70, 24.93, 275.96°)
OKLab	oklab(45.5% -0.0125 -0.0695)
OKLCH	oklch(45.5% 0.071 259.8)
XYZ	xyz(9.2227, 9.3789, 21.0589)
Luminance	0.0938 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F577E #7E663F

analogous

#3F777E #3F577E #473F7E

triadic

#3F577E #7E3F57 #577E3F

tetradic

#3F577E #7E3F77 #7E663F #3F7E47

square

#3F577E #7E3F77 #7E663F #3F7E47

split-complementary

#3F577E #7E473F #777E3F

monochromatic

#161F2C #2B3B55 #3F577E #5373A7 #7B94BD

Accessibility & contrast

On white

7.30

#3F577E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F577E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F577E

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F577E	#FFFFFF	#000000	##FFFFFF
##3F577E	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#485A80

Deuteranopia (green-blind)

#41547D

Tritanopia (blue-blind)

#245F65

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f577e;
/* rgb */ color: rgb(63, 87, 126);
/* oklch */ color: oklch(45.5% 0.071 259.8);

Tailwind

colors: {
  custom: {
    50: '#7886a3',
    500: '#3f577e',
    950: '#000000',
  },
}

SCSS

$custom: #3f577e;
$custom-light: #7886a3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f577e",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 126
  },
  "hsl": {
    "h": 217.143,
    "s": 33.333,
    "l": 37.059
  },
  "oklch": {
    "l": 0.455,
    "c": 0.07063,
    "h": 259.8
  },
  "luminance": 0.0938
}

Semantic roles & 50–950 ramp

primary

#3F577E

secondary

#A79372

accent

#A15EC9

background

#F7F8FA

surface

#EDEFF4

border

#C8CACE

text

#090B0F

muted

#7B7C7F

Preview Lab

Preview with #3F577E

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

Preview Lab → · Contrast checker → · Palette generator →