#3F449B#3F449B

#3F449B is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.3% C 0.139 H 276.4°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#3F449B
RGB	rgb(63, 68, 155)
HSL	hsl(237, 42%, 43%)
HSV	hsv(237, 59%, 61%)
CMYK	cmyk(59.4%, 56.1%, 0%, 39.2%)
CIE-LAB	lab(33.04, 24.90, -48.32)
CIE-LCH	lch(33.04, 54.36, 297.26°)
OKLab	oklab(43.26% 0.0155 -0.1385)
OKLCH	oklch(43.26% 0.139 276.4)
XYZ	xyz(10.0315, 7.5568, 31.9340)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F449B #9B963F

analogous

#3F729B #3F449B #683F9B

triadic

#3F449B #9B3F44 #449B3F

tetradic

#3F449B #9B3F72 #9B963F #3F9B68

square

#3F449B #9B3F72 #9B963F #3F9B68

split-complementary

#3F449B #9B683F #729B3F

monochromatic

#1C1E44 #2D316F #3F449B #5B60BC #868ACE

Accessibility & contrast

On white

8.36

#3F449B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F449B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F449B

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F449B	#FFFFFF	#000000	##FFFFFF
##3F449B	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04529E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f449b;
/* rgb */ color: rgb(63, 68, 155);
/* oklch */ color: oklch(43.3% 0.139 276.4);

Tailwind

colors: {
  custom: {
    50: '#7d77b9',
    500: '#3f449b',
    950: '#000000',
  },
}

SCSS

$custom: #3f449b;
$custom-light: #7d77b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f449b",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 155
  },
  "hsl": {
    "h": 236.739,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.43262,
    "c": 0.13942,
    "h": 276.4
  },
  "luminance": 0.07558
}

Semantic roles & 50–950 ramp

primary

#3F449B

secondary

#B8B57D

accent

#CB56D2

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0811

muted

#7C7B80

Preview Lab

Preview with #3F449B

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

Preview Lab → · Contrast checker → · Palette generator →