#3F507A#3F507A

#3F507A is a dark, moderate blue. Relative luminance 0.082; OKLCH L 43.6% C 0.073 H 266.6°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F507A
RGB	rgb(63, 80, 122)
HSL	hsl(223, 32%, 36%)
HSV	hsv(223, 48%, 48%)
CMYK	cmyk(48.4%, 34.4%, 0%, 52.2%)
CIE-LAB	lab(34.39, 5.77, -25.94)
CIE-LCH	lch(34.39, 26.57, 282.54°)
OKLab	oklab(43.64% -0.0043 -0.0729)
OKLCH	oklch(43.64% 0.073 266.6)
XYZ	xyz(8.4303, 8.1987, 19.5469)
Luminance	0.0820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F507A #7A693F

analogous

#3F6E7A #3F507A #4C3F7A

triadic

#3F507A #7A3F50 #507A3F

tetradic

#3F507A #7A3F6E #7A693F #3F7A4C

square

#3F507A #7A3F6E #7A693F #3F7A4C

split-complementary

#3F507A #7A4C3F #6E7A3F

monochromatic

#151B29 #2A3652 #3F507A #546AA2 #798CBA

Accessibility & contrast

On white

7.96

#3F507A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3F507A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F507A

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F507A	#FFFFFF	#000000	##FFFFFF
##3F507A	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41547C

Deuteranopia (green-blind)

#3A4E79

Tritanopia (blue-blind)

#28595F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f507a;
/* rgb */ color: rgb(63, 80, 122);
/* oklch */ color: oklch(43.6% 0.073 266.6);

Tailwind

colors: {
  custom: {
    50: '#7780a0',
    500: '#3f507a',
    950: '#000000',
  },
}

SCSS

$custom: #3f507a;
$custom-light: #7780a0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f507a",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 122
  },
  "hsl": {
    "h": 222.712,
    "s": 31.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43636,
    "c": 0.07299,
    "h": 266.6
  },
  "luminance": 0.08199
}

Semantic roles & 50–950 ramp

primary

#3F507A

secondary

#A49570

accent

#AA60C8

background

#F7F7F9

surface

#EDEEF2

border

#C8C9CC

text

#090A0F

muted

#7B7C7E

Preview Lab

Preview with #3F507A

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

Preview Lab → · Contrast checker → · Palette generator →