#3F5BB8#3F5BB8

#3F5BB8 is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.1% C 0.150 H 268.0°. Best body text is #FFFFFF at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB8
RGB	rgb(63, 91, 184)
HSL	hsl(226, 49%, 48%)
HSV	hsv(226, 66%, 72%)
CMYK	cmyk(65.8%, 50.5%, 0%, 27.8%)
CIE-LAB	lab(41.21, 20.18, -52.39)
CIE-LCH	lch(41.21, 56.15, 291.07°)
OKLab	oklab(50.06% -0.0052 -0.1502)
OKLCH	oklch(50.06% 0.15 268)
XYZ	xyz(14.4397, 11.9983, 46.8930)
Luminance	0.1200 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB8 #B89C3F

analogous

#3F97B8 #3F5BB8 #5F3FB8

triadic

#3F5BB8 #B83F5B #5BB83F

tetradic

#3F5BB8 #B83F97 #B89C3F #3FB85F

square

#3F5BB8 #B83F97 #B89C3F #3FB85F

split-complementary

#3F5BB8 #B85F3F #97B83F

monochromatic

#202E5D #2F448A #3F5BB8 #6980CC #96A6DB

Accessibility & contrast

On white

6.18

#3F5BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#3F5BB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB8

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB8	#FFFFFF	#000000	##FFFFFF
##3F5BB8	1.00	6.18	3.40	6.18
#FFFFFF	6.18	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2667BB

Deuteranopia (green-blind)

#005CB6

Tritanopia (blue-blind)

#007181

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5bb8;
/* rgb */ color: rgb(63, 91, 184);
/* oklch */ color: oklch(50.1% 0.150 268.0);

Tailwind

colors: {
  custom: {
    50: '#8189ce',
    500: '#3f5bb8',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb8;
$custom-light: #8189ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb8",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 184
  },
  "hsl": {
    "h": 226.116,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.50059,
    "c": 0.15033,
    "h": 268
  },
  "luminance": 0.12
}

Semantic roles & 50–950 ramp

primary

#3F5BB8

secondary

#C7B98C

accent

#B94FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3F5BB8

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

Preview Lab → · Contrast checker → · Palette generator →