#3F4E8B#3F4E8B

#3F4E8B is a dark, moderate blue. Relative luminance 0.084; OKLCH L 44.2% C 0.102 H 271.3°. Best body text is #FFFFFF at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F4E8B
RGB	rgb(63, 78, 139)
HSL	hsl(228, 38%, 40%)
HSV	hsv(228, 55%, 55%)
CMYK	cmyk(54.7%, 43.9%, 0%, 45.5%)
CIE-LAB	lab(34.74, 12.79, -35.86)
CIE-LCH	lch(34.74, 38.07, 289.63°)
OKLab	oklab(44.21% 0.0023 -0.1018)
OKLCH	oklch(44.21% 0.102 271.3)
XYZ	xyz(9.4330, 8.3690, 25.5394)
Luminance	0.0837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4E8B #8B7C3F

analogous

#3F748B #3F4E8B #563F8B

triadic

#3F4E8B #8B3F4E #4E8B3F

tetradic

#3F4E8B #8B3F74 #8B7C3F #3F8B56

square

#3F4E8B #8B3F74 #8B7C3F #3F8B56

split-complementary

#3F4E8B #8B563F #748B3F

monochromatic

#191F37 #2C3661 #3F4E8B #5567B2 #7F8DC5

Accessibility & contrast

On white

7.85

#3F4E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3F4E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4E8B

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4E8B	#FFFFFF	#000000	##FFFFFF
##3F4E8B	1.00	7.85	2.67	7.85
#FFFFFF	7.85	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34558D

Deuteranopia (green-blind)

#2C4F8A

Tritanopia (blue-blind)

#1A5B65

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f4e8b;
/* rgb */ color: rgb(63, 78, 139);
/* oklch */ color: oklch(44.2% 0.102 271.3);

Tailwind

colors: {
  custom: {
    50: '#7a7fad',
    500: '#3f4e8b',
    950: '#000000',
  },
}

SCSS

$custom: #3f4e8b;
$custom-light: #7a7fad;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4e8b",
  "rgb": {
    "r": 63,
    "g": 78,
    "b": 139
  },
  "hsl": {
    "h": 228.158,
    "s": 37.624,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44208,
    "c": 0.10185,
    "h": 271.3
  },
  "luminance": 0.0837
}

Semantic roles & 50–950 ramp

primary

#3F4E8B

secondary

#AFA476

accent

#B75ACE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0A10

muted

#7C7C7F

Preview Lab

Preview with #3F4E8B

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

Preview Lab → · Contrast checker → · Palette generator →