#3F508E#3F508E

#3F508E is a dark, moderate blue. Relative luminance 0.087; OKLCH L 44.8% C 0.104 H 270.2°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F508E
RGB	rgb(63, 80, 142)
HSL	hsl(227, 39%, 40%)
HSV	hsv(227, 56%, 56%)
CMYK	cmyk(55.6%, 43.7%, 0%, 44.3%)
CIE-LAB	lab(35.49, 12.51, -36.50)
CIE-LCH	lch(35.49, 38.58, 288.92°)
OKLab	oklab(44.84% 0.0005 -0.1037)
OKLCH	oklch(44.84% 0.104 270.2)
XYZ	xyz(9.7994, 8.7464, 26.7578)
Luminance	0.0875 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F508E #8E7D3F

analogous

#3F778E #3F508E #563F8E

triadic

#3F508E #8E3F50 #508E3F

tetradic

#3F508E #8E3F77 #8E7D3F #3F8E56

square

#3F508E #8E3F77 #8E7D3F #3F8E56

split-complementary

#3F508E #8E563F #778E3F

monochromatic

#192039 #2C3864 #3F508E #566AB4 #8190C7

Accessibility & contrast

On white

7.64

#3F508E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#3F508E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F508E

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F508E	#FFFFFF	#000000	##FFFFFF
##3F508E	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365790

Deuteranopia (green-blind)

#2C508D

Tritanopia (blue-blind)

#165E68

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f508e;
/* rgb */ color: rgb(63, 80, 142);
/* oklch */ color: oklch(44.8% 0.104 270.2);

Tailwind

colors: {
  custom: {
    50: '#7a80af',
    500: '#3f508e',
    950: '#000000',
  },
}

SCSS

$custom: #3f508e;
$custom-light: #7a80af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f508e",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 142
  },
  "hsl": {
    "h": 227.089,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44842,
    "c": 0.10366,
    "h": 270.2
  },
  "luminance": 0.08747
}

Semantic roles & 50–950 ramp

primary

#3F508E

secondary

#B1A578

accent

#B559CE

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0A10

muted

#7C7C7F

Preview Lab

Preview with #3F508E

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

Preview Lab → · Contrast checker → · Palette generator →