#3F378E#3F378E

#3F378E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.8% C 0.139 H 282.2°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F378E
RGB	rgb(63, 55, 142)
HSL	hsl(246, 44%, 39%)
HSV	hsv(246, 61%, 56%)
CMYK	cmyk(55.6%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(28.75, 28.91, -47.33)
CIE-LCH	lch(28.75, 55.46, 301.42°)
OKLab	oklab(39.77% 0.0294 -0.1357)
OKLCH	oklch(39.77% 0.139 282.2)
XYZ	xyz(8.2971, 5.7416, 26.2570)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F378E #868E37

analogous

#375A8E #3F378E #6A378E

triadic

#3F378E #8E3F37 #378E3F

tetradic

#3F378E #8E375A #868E37 #378E6A

square

#3F378E #8E375A #868E37 #378E6A

split-complementary

#3F378E #8E6A37 #5A8E37

monochromatic

#181536 #2B2662 #3F378E #5449B9 #7D76CA

Accessibility & contrast

On white

9.77

#3F378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#3F378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F378E

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F378E	#FFFFFF	#000000	##FFFFFF
##3F378E	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#00418C

Tritanopia (blue-blind)

#1B4C5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3f378e;
/* rgb */ color: rgb(63, 55, 142);
/* oklch */ color: oklch(39.8% 0.139 282.2);

Tailwind

colors: {
  custom: {
    50: '#7c6eb0',
    500: '#3f378e',
    950: '#000000',
  },
}

SCSS

$custom: #3f378e;
$custom-light: #7c6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f378e",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 245.517,
    "s": 44.162,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39772,
    "c": 0.13887,
    "h": 282.2
  },
  "luminance": 0.05742
}

Semantic roles & 50–950 ramp

primary

#3F378E

secondary

#ACB36E

accent

#D454C8

background

#F7F6FA

surface

#EEECF5

border

#C9C7CF

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #3F378E

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

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