#3F459C#3F459C

#3F459C is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.5% C 0.139 H 276.0°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#3F459C
RGB	rgb(63, 69, 156)
HSL	hsl(236, 42%, 43%)
HSV	hsv(236, 60%, 61%)
CMYK	cmyk(59.6%, 55.8%, 0%, 38.8%)
CIE-LAB	lab(33.38, 24.59, -48.39)
CIE-LCH	lch(33.38, 54.28, 296.94°)
OKLab	oklab(43.54% 0.0145 -0.1387)
OKLCH	oklch(43.54% 0.139 276)
XYZ	xyz(10.1768, 7.7126, 32.3984)
Luminance	0.0771 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F459C #9C963F

analogous

#3F739C #3F459C #673F9C

triadic

#3F459C #9C3F45 #459C3F

tetradic

#3F459C #9C3F73 #9C963F #3F9C67

square

#3F459C #9C3F73 #9C963F #3F9C67

split-complementary

#3F459C #9C673F #739C3F

monochromatic

#1C1E45 #2D3270 #3F459C #5B62BD #878CCE

Accessibility & contrast

On white

8.26

#3F459C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3F459C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F459C

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F459C	#FFFFFF	#000000	##FFFFFF
##3F459C	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07539F

Deuteranopia (green-blind)

#004B9A

Tritanopia (blue-blind)

#005969

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f459c;
/* rgb */ color: rgb(63, 69, 156);
/* oklch */ color: oklch(43.5% 0.139 276.0);

Tailwind

colors: {
  custom: {
    50: '#7d78ba',
    500: '#3f459c',
    950: '#000000',
  },
}

SCSS

$custom: #3f459c;
$custom-light: #7d78ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f459c",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 156
  },
  "hsl": {
    "h": 236.129,
    "s": 42.466,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43535,
    "c": 0.13949,
    "h": 276
  },
  "luminance": 0.07713
}

Semantic roles & 50–950 ramp

primary

#3F459C

secondary

#B9B57E

accent

#CA56D2

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #3F459C

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

Preview Lab → · Contrast checker → · Palette generator →