#3F58CB#3F58CB

#3F58CB is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.9% C 0.180 H 269.6°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#3F58CB
RGB	rgb(63, 88, 203)
HSL	hsl(229, 57%, 52%)
HSV	hsv(229, 69%, 80%)
CMYK	cmyk(69%, 56.7%, 0%, 20.4%)
CIE-LAB	lab(41.76, 28.91, -62.55)
CIE-LCH	lch(41.76, 68.91, 294.80°)
OKLab	oklab(50.9% -0.0012 -0.1802)
OKLCH	oklch(50.9% 0.18 269.6)
XYZ	xyz(16.3154, 12.3464, 58.0116)
Luminance	0.1235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58CB #CBB23F

analogous

#3F9ECB #3F58CB #6C3FCB

triadic

#3F58CB #CB3F58 #58CB3F

tetradic

#3F58CB #CB3F9E #CBB23F #3FCB6C

square

#3F58CB #CB3F9E #CBB23F #3FCB6C

split-complementary

#3F58CB #CB6C3F #9ECB3F

monochromatic

#1F2D71 #2C41A1 #3F58CB #6F82D8 #9FACE5

Accessibility & contrast

On white

6.05

#3F58CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#3F58CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58CB

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58CB	#FFFFFF	#000000	##FFFFFF
##3F58CB	1.00	6.05	3.47	6.05
#FFFFFF	6.05	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069CF

Deuteranopia (green-blind)

#005CC9

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f58cb;
/* rgb */ color: rgb(63, 88, 203);
/* oklch */ color: oklch(50.9% 0.180 269.6);

Tailwind

colors: {
  custom: {
    50: '#8586dc',
    500: '#3f58cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f58cb;
$custom-light: #8586dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58cb",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 203
  },
  "hsl": {
    "h": 229.286,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.50897,
    "c": 0.18016,
    "h": 269.6
  },
  "luminance": 0.12348
}

Semantic roles & 50–950 ramp

primary

#3F58CB

secondary

#D1C794

accent

#C547E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F58CB

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

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