#3F4E8A#3F4E8A

#3F4E8A is a dark, moderate blue. Relative luminance 0.083; OKLCH L 44.1% C 0.100 H 271.2°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#3F4E8A
RGB	rgb(63, 78, 138)
HSL	hsl(228, 37%, 39%)
HSV	hsv(228, 54%, 54%)
CMYK	cmyk(54.3%, 43.5%, 0%, 45.9%)
CIE-LAB	lab(34.68, 12.44, -35.34)
CIE-LCH	lch(34.68, 37.47, 289.40°)
OKLab	oklab(44.14% 0.0021 -0.1003)
OKLCH	oklch(44.14% 0.1 271.2)
XYZ	xyz(9.3602, 8.3399, 25.1563)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4E8A #8A7B3F

analogous

#3F748A #3F4E8A #563F8A

triadic

#3F4E8A #8A3F4E #4E8A3F

tetradic

#3F4E8A #8A3F74 #8A7B3F #3F8A56

square

#3F4E8A #8A3F74 #8A7B3F #3F8A56

split-complementary

#3F4E8A #8A563F #748A3F

monochromatic

#191F36 #2C3660 #3F4E8A #5567B1 #7F8DC5

Accessibility & contrast

On white

7.87

#3F4E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3F4E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4E8A

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4E8A	#FFFFFF	#000000	##FFFFFF
##3F4E8A	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#35558C

Deuteranopia (green-blind)

#2D4F89

Tritanopia (blue-blind)

#1B5B65

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f4e8a;
/* rgb */ color: rgb(63, 78, 138);
/* oklch */ color: oklch(44.1% 0.100 271.2);

Tailwind

colors: {
  custom: {
    50: '#7a7fac',
    500: '#3f4e8a',
    950: '#000000',
  },
}

SCSS

$custom: #3f4e8a;
$custom-light: #7a7fac;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4e8a",
  "rgb": {
    "r": 63,
    "g": 78,
    "b": 138
  },
  "hsl": {
    "h": 228,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44144,
    "c": 0.10032,
    "h": 271.2
  },
  "luminance": 0.08341
}

Semantic roles & 50–950 ramp

primary

#3F4E8A

secondary

#AFA376

accent

#B65BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #3F4E8A

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

Preview Lab → · Contrast checker → · Palette generator →