#3F58B4#3F58B4

#3F58B4 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.2% C 0.149 H 268.9°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#3F58B4
RGB	rgb(63, 88, 180)
HSL	hsl(227, 48%, 48%)
HSV	hsv(227, 65%, 71%)
CMYK	cmyk(65%, 51.1%, 0%, 29.4%)
CIE-LAB	lab(40.13, 20.69, -51.79)
CIE-LCH	lch(40.13, 55.77, 291.78°)
OKLab	oklab(49.15% -0.0028 -0.1485)
OKLCH	oklch(49.15% 0.149 268.9)
XYZ	xyz(13.7750, 11.3303, 44.6322)
Luminance	0.1133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58B4 #B49B3F

analogous

#3F93B4 #3F58B4 #603FB4

triadic

#3F58B4 #B43F58 #58B43F

tetradic

#3F58B4 #B43F93 #B49B3F #3FB460

square

#3F58B4 #B43F93 #B49B3F #3FB460

split-complementary

#3F58B4 #B4603F #93B43F

monochromatic

#1F2C59 #2F4287 #3F58B4 #677CCA #94A3DA

Accessibility & contrast

On white

6.43

#3F58B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3F58B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58B4

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58B4	#FFFFFF	#000000	##FFFFFF
##3F58B4	1.00	6.43	3.27	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2364B7

Deuteranopia (green-blind)

#005AB2

Tritanopia (blue-blind)

#006D7D

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f58b4;
/* rgb */ color: rgb(63, 88, 180);
/* oklch */ color: oklch(49.2% 0.149 268.9);

Tailwind

colors: {
  custom: {
    50: '#8086cb',
    500: '#3f58b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f58b4;
$custom-light: #8086cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58b4",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 180
  },
  "hsl": {
    "h": 227.179,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.49152,
    "c": 0.14854,
    "h": 268.9
  },
  "luminance": 0.11331
}

Semantic roles & 50–950 ramp

primary

#3F58B4

secondary

#C5B88A

accent

#BB50D8

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F58B4

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

Preview Lab → · Contrast checker → · Palette generator →