#3F4E9B#3F4E9B

#3F4E9B is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.3% C 0.126 H 272.2°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3F4E9B
RGB	rgb(63, 78, 155)
HSL	hsl(230, 42%, 43%)
HSV	hsv(230, 59%, 61%)
CMYK	cmyk(59.4%, 49.7%, 0%, 39.2%)
CIE-LAB	lab(35.74, 18.34, -43.98)
CIE-LCH	lch(35.74, 47.66, 292.64°)
OKLab	oklab(45.29% 0.0048 -0.1257)
OKLCH	oklch(45.29% 0.126 272.2)
XYZ	xyz(10.6887, 8.8713, 32.1531)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4E9B #9B8C3F

analogous

#3F7C9B #3F4E9B #5E3F9B

triadic

#3F4E9B #9B3F4E #4E9B3F

tetradic

#3F4E9B #9B3F7C #9B8C3F #3F9B5E

square

#3F4E9B #9B3F7C #9B8C3F #3F9B5E

split-complementary

#3F4E9B #9B5E3F #7C9B3F

monochromatic

#1C2244 #2D386F #3F4E9B #5B6BBC #8692CE

Accessibility & contrast

On white

7.57

#3F4E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3F4E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4E9B

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4E9B	#FFFFFF	#000000	##FFFFFF
##3F4E9B	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27589E

Deuteranopia (green-blind)

#185099

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f4e9b;
/* rgb */ color: rgb(63, 78, 155);
/* oklch */ color: oklch(45.3% 0.126 272.2);

Tailwind

colors: {
  custom: {
    50: '#7c7fb9',
    500: '#3f4e9b',
    950: '#000000',
  },
}

SCSS

$custom: #3f4e9b;
$custom-light: #7c7fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4e9b",
  "rgb": {
    "r": 63,
    "g": 78,
    "b": 155
  },
  "hsl": {
    "h": 230.217,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.45289,
    "c": 0.12577,
    "h": 272.2
  },
  "luminance": 0.08872
}

Semantic roles & 50–950 ramp

primary

#3F4E9B

secondary

#B8AF7D

accent

#BE56D2

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #3F4E9B

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

Preview Lab → · Contrast checker → · Palette generator →