#3F58D9#3F58D9

#3F58D9 is a mid, vivid blue. Relative luminance 0.130; OKLCH L 52.0% C 0.199 H 269.7°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F58D9
RGB	rgb(63, 88, 217)
HSL	hsl(230, 67%, 55%)
HSV	hsv(230, 71%, 85%)
CMYK	cmyk(71%, 59.4%, 0%, 14.9%)
CIE-LAB	lab(42.83, 33.87, -68.85)
CIE-LCH	lch(42.83, 76.73, 296.20°)
OKLab	oklab(52.03% -0.001 -0.1987)
OKLCH	oklch(52.03% 0.199 269.7)
XYZ	xyz(18.0597, 13.0441, 67.1982)
Luminance	0.1305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58D9 #D9C03F

analogous

#3FA5D9 #3F58D9 #733FD9

triadic

#3F58D9 #D93F58 #58D93F

tetradic

#3F58D9 #D93FA5 #D9C03F #3FD973

square

#3F58D9 #D93FA5 #D9C03F #3FD973

split-complementary

#3F58D9 #D9733F #A5D93F

monochromatic

#1A2B84 #243CB7 #3F58D9 #7284E3 #A5B1ED

Accessibility & contrast

On white

5.82

#3F58D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#3F58D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58D9

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58D9	#FFFFFF	#000000	##FFFFFF
##3F58D9	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDD

Deuteranopia (green-blind)

#005ED6

Tritanopia (blue-blind)

#007890

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f58d9;
/* rgb */ color: rgb(63, 88, 217);
/* oklch */ color: oklch(52.0% 0.199 269.7);

Tailwind

colors: {
  custom: {
    50: '#8887e6',
    500: '#3f58d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f58d9;
$custom-light: #8887e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58d9",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 217
  },
  "hsl": {
    "h": 230.26,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.52028,
    "c": 0.19867,
    "h": 269.7
  },
  "luminance": 0.13046
}

Semantic roles & 50–950 ramp

primary

#3F58D9

secondary

#DAD09A

accent

#CE3EEA

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F58D9

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

Preview Lab → · Contrast checker → · Palette generator →