#3F577A#3F577A

#3F577A is a mid, moderate blue. Relative luminance 0.093; OKLCH L 45.3% C 0.065 H 257.7°. Best body text is #FFFFFF at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F577A
RGB	rgb(63, 87, 122)
HSL	hsl(216, 32%, 36%)
HSV	hsv(216, 48%, 48%)
CMYK	cmyk(48.4%, 28.7%, 0%, 52.2%)
CIE-LAB	lab(36.51, 1.29, -22.63)
CIE-LCH	lch(36.51, 22.67, 273.26°)
OKLab	oklab(45.29% -0.0138 -0.0633)
OKLCH	oklch(45.29% 0.065 257.7)
XYZ	xyz(8.9698, 9.2777, 19.7267)
Luminance	0.0928 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F577A #7A623F

analogous

#3F757A #3F577A #453F7A

triadic

#3F577A #7A3F57 #577A3F

tetradic

#3F577A #7A3F75 #7A623F #3F7A45

square

#3F577A #7A3F75 #7A623F #3F7A45

split-complementary

#3F577A #7A453F #757A3F

monochromatic

#151D29 #2A3A52 #3F577A #5474A2 #7994BA

Accessibility & contrast

On white

7.35

#3F577A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3F577A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F577A

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F577A	#FFFFFF	#000000	##FFFFFF
##3F577A	1.00	7.35	2.86	7.35
#FFFFFF	7.35	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A597C

Deuteranopia (green-blind)

#435379

Tritanopia (blue-blind)

#275F63

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f577a;
/* rgb */ color: rgb(63, 87, 122);
/* oklch */ color: oklch(45.3% 0.065 257.7);

Tailwind

colors: {
  custom: {
    50: '#7786a0',
    500: '#3f577a',
    950: '#000000',
  },
}

SCSS

$custom: #3f577a;
$custom-light: #7786a0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f577a",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 122
  },
  "hsl": {
    "h": 215.593,
    "s": 31.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.45288,
    "c": 0.06475,
    "h": 257.7
  },
  "luminance": 0.09278
}

Semantic roles & 50–950 ramp

primary

#3F577A

secondary

#A48F70

accent

#9E60C8

background

#F7F8F9

surface

#EDEFF2

border

#C8CACC

text

#090B0E

muted

#7B7C7E

Preview Lab

Preview with #3F577A

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

Preview Lab → · Contrast checker → · Palette generator →