#3F577C#3F577C

#3F577C is a mid, moderate blue. Relative luminance 0.093; OKLCH L 45.4% C 0.068 H 258.8°. Best body text is #FFFFFF at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F577C
RGB	rgb(63, 87, 124)
HSL	hsl(216, 33%, 37%)
HSV	hsv(216, 49%, 49%)
CMYK	cmyk(49.2%, 29.8%, 0%, 51.4%)
CIE-LAB	lab(36.61, 1.94, -23.71)
CIE-LCH	lch(36.61, 23.79, 274.67°)
OKLab	oklab(45.39% -0.0131 -0.0664)
OKLCH	oklch(45.39% 0.068 258.8)
XYZ	xyz(9.0950, 9.3278, 20.3861)
Luminance	0.0933 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F577C #7C643F

analogous

#3F767C #3F577C #463F7C

triadic

#3F577C #7C3F57 #577C3F

tetradic

#3F577C #7C3F76 #7C643F #3F7C46

square

#3F577C #7C3F76 #7C643F #3F7C46

split-complementary

#3F577C #7C463F #767C3F

monochromatic

#161E2B #2A3B53 #3F577C #5473A5 #7A94BB

Accessibility & contrast

On white

7.33

#3F577C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#3F577C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F577C

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F577C	#FFFFFF	#000000	##FFFFFF
##3F577C	1.00	7.33	2.87	7.33
#FFFFFF	7.33	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49597E

Deuteranopia (green-blind)

#42537B

Tritanopia (blue-blind)

#265F64

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f577c;
/* rgb */ color: rgb(63, 87, 124);
/* oklch */ color: oklch(45.4% 0.068 258.8);

Tailwind

colors: {
  custom: {
    50: '#7886a2',
    500: '#3f577c',
    950: '#000000',
  },
}

SCSS

$custom: #3f577c;
$custom-light: #7886a2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f577c",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 124
  },
  "hsl": {
    "h": 216.393,
    "s": 32.62,
    "l": 36.667
  },
  "oklch": {
    "l": 0.45393,
    "c": 0.06768,
    "h": 258.8
  },
  "luminance": 0.09328
}

Semantic roles & 50–950 ramp

primary

#3F577C

secondary

#A69171

accent

#9F5FC9

background

#F7F8F9

surface

#EDEFF2

border

#C8CACC

text

#090B0F

muted

#7B7C7E

Preview Lab

Preview with #3F577C

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

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