#3F489E#3F489E

#3F489E is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.3% C 0.138 H 274.8°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F489E
RGB	rgb(63, 72, 158)
HSL	hsl(234, 43%, 43%)
HSV	hsv(234, 60%, 62%)
CMYK	cmyk(60.1%, 54.4%, 0%, 38%)
CIE-LAB	lab(34.31, 23.33, -48.09)
CIE-LCH	lch(34.31, 53.45, 295.88°)
OKLab	oklab(44.28% 0.0115 -0.1378)
OKLCH	oklch(44.28% 0.138 274.8)
XYZ	xyz(10.5368, 8.1593, 33.3608)
Luminance	0.0816 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F489E #9E953F

analogous

#3F779E #3F489E #653F9E

triadic

#3F489E #9E3F48 #489E3F

tetradic

#3F489E #9E3F77 #9E953F #3F9E65

square

#3F489E #9E3F77 #9E953F #3F9E65

split-complementary

#3F489E #9E653F #779E3F

monochromatic

#1C2046 #2E3472 #3F489E #5C65BE #888FD0

Accessibility & contrast

On white

7.98

#3F489E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3F489E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F489E

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F489E	#FFFFFF	#000000	##FFFFFF
##3F489E	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1155A1

Deuteranopia (green-blind)

#004D9C

Tritanopia (blue-blind)

#005C6C

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f489e;
/* rgb */ color: rgb(63, 72, 158);
/* oklch */ color: oklch(44.3% 0.138 274.8);

Tailwind

colors: {
  custom: {
    50: '#7d7abb',
    500: '#3f489e',
    950: '#000000',
  },
}

SCSS

$custom: #3f489e;
$custom-light: #7d7abb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f489e",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 158
  },
  "hsl": {
    "h": 234.316,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.44281,
    "c": 0.13829,
    "h": 274.8
  },
  "luminance": 0.0816
}

Semantic roles & 50–950 ramp

primary

#3F489E

secondary

#BAB47F

accent

#C755D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #3F489E

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

Preview Lab → · Contrast checker → · Palette generator →