#3F459B#3F459B

#3F459B is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.5% C 0.138 H 276.0°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3F459B
RGB	rgb(63, 69, 155)
HSL	hsl(236, 42%, 43%)
HSV	hsv(236, 59%, 61%)
CMYK	cmyk(59.4%, 55.5%, 0%, 39.2%)
CIE-LAB	lab(33.30, 24.25, -47.90)
CIE-LCH	lch(33.30, 53.69, 296.85°)
OKLab	oklab(43.46% 0.0145 -0.1373)
OKLCH	oklch(43.46% 0.138 276)
XYZ	xyz(10.0925, 7.6788, 31.9543)
Luminance	0.0768 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F459B #9B953F

analogous

#3F739B #3F459B #673F9B

triadic

#3F459B #9B3F45 #459B3F

tetradic

#3F459B #9B3F73 #9B953F #3F9B67

square

#3F459B #9B3F73 #9B953F #3F9B67

split-complementary

#3F459B #9B673F #739B3F

monochromatic

#1C1E44 #2D326F #3F459B #5B61BC #868BCE

Accessibility & contrast

On white

8.28

#3F459B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3F459B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F459B

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F459B	#FFFFFF	#000000	##FFFFFF
##3F459B	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A529E

Deuteranopia (green-blind)

#004B99

Tritanopia (blue-blind)

#005969

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f459b;
/* rgb */ color: rgb(63, 69, 155);
/* oklch */ color: oklch(43.5% 0.138 276.0);

Tailwind

colors: {
  custom: {
    50: '#7d78b9',
    500: '#3f459b',
    950: '#000000',
  },
}

SCSS

$custom: #3f459b;
$custom-light: #7d78b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f459b",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 155
  },
  "hsl": {
    "h": 236.087,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.43458,
    "c": 0.13805,
    "h": 276
  },
  "luminance": 0.0768
}

Semantic roles & 50–950 ramp

primary

#3F459B

secondary

#B8B57D

accent

#CA56D2

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0911

muted

#7C7B80

Preview Lab

Preview with #3F459B

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

Preview Lab → · Contrast checker → · Palette generator →