#3F488E#3F488E

#3F488E is a dark, moderate blue. Relative luminance 0.076; OKLCH L 43.1% C 0.115 H 275.0°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F488E
RGB	rgb(63, 72, 142)
HSL	hsl(233, 39%, 40%)
HSV	hsv(233, 56%, 56%)
CMYK	cmyk(55.6%, 49.3%, 0%, 44.3%)
CIE-LAB	lab(33.23, 17.77, -40.11)
CIE-LCH	lch(33.23, 43.87, 293.90°)
OKLab	oklab(43.12% 0.01 -0.1143)
OKLCH	oklch(43.12% 0.115 275)
XYZ	xyz(9.2482, 7.6439, 26.5740)
Luminance	0.0764 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F488E #8E853F

analogous

#3F6F8E #3F488E #5E3F8E

triadic

#3F488E #8E3F48 #488E3F

tetradic

#3F488E #8E3F6F #8E853F #3F8E5E

square

#3F488E #8E3F6F #8E853F #3F8E5E

split-complementary

#3F488E #8E5E3F #6F8E3F

monochromatic

#191D39 #2C3364 #3F488E #5661B4 #8189C7

Accessibility & contrast

On white

8.30

#3F488E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#3F488E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F488E

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F488E	#FFFFFF	#000000	##FFFFFF
##3F488E	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275291

Deuteranopia (green-blind)

#1D4B8C

Tritanopia (blue-blind)

#185764

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f488e;
/* rgb */ color: rgb(63, 72, 142);
/* oklch */ color: oklch(43.1% 0.115 275.0);

Tailwind

colors: {
  custom: {
    50: '#7a7aaf',
    500: '#3f488e',
    950: '#000000',
  },
}

SCSS

$custom: #3f488e;
$custom-light: #7a7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f488e",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 142
  },
  "hsl": {
    "h": 233.165,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.43118,
    "c": 0.11478,
    "h": 275
  },
  "luminance": 0.07644
}

Semantic roles & 50–950 ramp

primary

#3F488E

secondary

#B1AB78

accent

#C159CE

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F488E

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

Preview Lab → · Contrast checker → · Palette generator →