#3F509B#3F509B

#3F509B is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.7% C 0.123 H 271.2°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F509B
RGB	rgb(63, 80, 155)
HSL	hsl(229, 42%, 43%)
HSV	hsv(229, 59%, 61%)
CMYK	cmyk(59.4%, 48.4%, 0%, 39.2%)
CIE-LAB	lab(36.29, 17.03, -43.09)
CIE-LCH	lch(36.29, 46.34, 291.57°)
OKLab	oklab(45.71% 0.0026 -0.123)
OKLCH	oklch(45.71% 0.123 271.2)
XYZ	xyz(10.8330, 9.1598, 32.2011)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F509B #9B8A3F

analogous

#3F7E9B #3F509B #5C3F9B

triadic

#3F509B #9B3F50 #509B3F

tetradic

#3F509B #9B3F7E #9B8A3F #3F9B5C

square

#3F509B #9B3F7E #9B8A3F #3F9B5C

split-complementary

#3F509B #9B5C3F #7E9B3F

monochromatic

#1C2344 #2D3A6F #3F509B #5B6DBC #8694CE

Accessibility & contrast

On white

7.41

#3F509B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#3F509B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F509B

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F509B	#FFFFFF	#000000	##FFFFFF
##3F509B	1.00	7.41	2.83	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5A9E

Deuteranopia (green-blind)

#1D5299

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f509b;
/* rgb */ color: rgb(63, 80, 155);
/* oklch */ color: oklch(45.7% 0.123 271.2);

Tailwind

colors: {
  custom: {
    50: '#7c80b9',
    500: '#3f509b',
    950: '#000000',
  },
}

SCSS

$custom: #3f509b;
$custom-light: #7c80b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f509b",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 155
  },
  "hsl": {
    "h": 228.913,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.4571,
    "c": 0.12307,
    "h": 271.2
  },
  "luminance": 0.09161
}

Semantic roles & 50–950 ramp

primary

#3F509B

secondary

#B8AE7D

accent

#BB56D2

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #3F509B

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

Preview Lab → · Contrast checker → · Palette generator →