#3F58D7#3F58D7

#3F58D7 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.9% C 0.196 H 269.7°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F58D7
RGB	rgb(63, 88, 215)
HSL	hsl(230, 66%, 55%)
HSV	hsv(230, 71%, 84%)
CMYK	cmyk(70.7%, 59.1%, 0%, 15.7%)
CIE-LAB	lab(42.67, 33.17, -67.96)
CIE-LCH	lch(42.67, 75.62, 296.01°)
OKLab	oklab(51.86% -0.001 -0.1961)
OKLCH	oklch(51.86% 0.196 269.7)
XYZ	xyz(17.8012, 12.9407, 65.8365)
Luminance	0.1294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58D7 #D7BE3F

analogous

#3FA4D7 #3F58D7 #723FD7

triadic

#3F58D7 #D73F58 #58D73F

tetradic

#3F58D7 #D73FA4 #D7BE3F #3FD772

square

#3F58D7 #D73FA4 #D7BE3F #3FD772

split-complementary

#3F58D7 #D7723F #A4D73F

monochromatic

#1B2C81 #253DB3 #3F58D7 #7284E2 #A4B0EC

Accessibility & contrast

On white

5.85

#3F58D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#3F58D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58D7

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58D7	#FFFFFF	#000000	##FFFFFF
##3F58D7	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDB

Deuteranopia (green-blind)

#005ED5

Tritanopia (blue-blind)

#00788F

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f58d7;
/* rgb */ color: rgb(63, 88, 215);
/* oklch */ color: oklch(51.9% 0.196 269.7);

Tailwind

colors: {
  custom: {
    50: '#8787e4',
    500: '#3f58d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f58d7;
$custom-light: #8787e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58d7",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 215
  },
  "hsl": {
    "h": 230.132,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.51863,
    "c": 0.19606,
    "h": 269.7
  },
  "luminance": 0.12943
}

Semantic roles & 50–950 ramp

primary

#3F58D7

secondary

#D9CE99

accent

#CD3FE8

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F58D7

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

Preview Lab → · Contrast checker → · Palette generator →