#3F4DB9#3F4DB9

#3F4DB9 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.4% C 0.170 H 272.6°. Best body text is #FFFFFF at 7.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DB9
RGB	rgb(63, 77, 185)
HSL	hsl(233, 49%, 49%)
HSV	hsv(233, 66%, 73%)
CMYK	cmyk(65.9%, 58.4%, 0%, 27.5%)
CIE-LAB	lab(37.60, 29.57, -58.83)
CIE-LCH	lch(37.60, 65.84, 296.68°)
OKLab	oklab(47.37% 0.0076 -0.1693)
OKLCH	oklch(47.37% 0.17 272.6)
XYZ	xyz(13.4578, 9.8661, 47.0847)
Luminance	0.0987 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DB9 #B9AB3F

analogous

#3F8AB9 #3F4DB9 #6E3FB9

triadic

#3F4DB9 #B93F4D #4DB93F

tetradic

#3F4DB9 #B93F8A #B9AB3F #3FB96E

square

#3F4DB9 #B93F8A #B9AB3F #3FB96E

split-complementary

#3F4DB9 #B96E3F #8AB93F

monochromatic

#20275E #2F3A8B #3F4DB9 #6975CC #979FDC

Accessibility & contrast

On white

7.06

#3F4DB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F4DB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4DB9

7.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DB9	#FFFFFF	#000000	##FFFFFF
##3F4DB9	1.00	7.06	2.97	7.06
#FFFFFF	7.06	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBD

Deuteranopia (green-blind)

#0053B7

Tritanopia (blue-blind)

#00677B

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f4db9;
/* rgb */ color: rgb(63, 77, 185);
/* oklch */ color: oklch(47.4% 0.170 272.6);

Tailwind

colors: {
  custom: {
    50: '#827ecf',
    500: '#3f4db9',
    950: '#000000',
  },
}

SCSS

$custom: #3f4db9;
$custom-light: #827ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4db9",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 185
  },
  "hsl": {
    "h": 233.115,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.47366,
    "c": 0.16951,
    "h": 272.6
  },
  "luminance": 0.09867
}

Semantic roles & 50–950 ramp

primary

#3F4DB9

secondary

#C7C08D

accent

#C94FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4DB9

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

Preview Lab → · Contrast checker → · Palette generator →