#3F548B#3F548B

#3F548B is a mid, moderate blue. Relative luminance 0.093; OKLCH L 45.5% C 0.094 H 266.9°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#3F548B
RGB	rgb(63, 84, 139)
HSL	hsl(223, 38%, 40%)
HSV	hsv(223, 55%, 55%)
CMYK	cmyk(54.7%, 39.6%, 0%, 45.5%)
CIE-LAB	lab(36.48, 8.87, -33.10)
CIE-LCH	lch(36.48, 34.26, 285.01°)
OKLab	oklab(45.55% -0.0051 -0.0937)
OKLCH	oklch(45.55% 0.094 266.9)
XYZ	xyz(9.8789, 9.2608, 25.6880)
Luminance	0.0926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F548B #8B763F

analogous

#3F7A8B #3F548B #503F8B

triadic

#3F548B #8B3F54 #548B3F

tetradic

#3F548B #8B3F7A #8B763F #3F8B50

square

#3F548B #8B3F7A #8B763F #3F8B50

split-complementary

#3F548B #8B503F #7A8B3F

monochromatic

#192137 #2C3B61 #3F548B #556FB2 #7F93C5

Accessibility & contrast

On white

7.36

#3F548B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3F548B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F548B

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F548B	#FFFFFF	#000000	##FFFFFF
##3F548B	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E598D

Deuteranopia (green-blind)

#35538A

Tritanopia (blue-blind)

#196069

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f548b;
/* rgb */ color: rgb(63, 84, 139);
/* oklch */ color: oklch(45.5% 0.094 266.9);

Tailwind

colors: {
  custom: {
    50: '#7a83ad',
    500: '#3f548b',
    950: '#000000',
  },
}

SCSS

$custom: #3f548b;
$custom-light: #7a83ad;
$custom-dark: #000000;

JSON

{
  "hex": "#3f548b",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 139
  },
  "hsl": {
    "h": 223.421,
    "s": 37.624,
    "l": 39.608
  },
  "oklch": {
    "l": 0.45548,
    "c": 0.09382,
    "h": 266.9
  },
  "luminance": 0.09261
}

Semantic roles & 50–950 ramp

primary

#3F548B

secondary

#AFA076

accent

#AE5ACE

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #3F548B

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

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