#3F77D2#3F77D2

#3F77D2 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.8% C 0.152 H 259.7°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F77D2
RGB	rgb(63, 119, 210)
HSL	hsl(217, 62%, 54%)
HSV	hsv(217, 70%, 82%)
CMYK	cmyk(70%, 43.3%, 0%, 17.6%)
CIE-LAB	lab(50.57, 11.81, -52.35)
CIE-LCH	lch(50.57, 53.67, 282.71°)
OKLab	oklab(57.75% -0.0273 -0.1497)
OKLCH	oklch(57.75% 0.152 259.7)
XYZ	xyz(20.2754, 18.9014, 63.5401)
Luminance	0.1890 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77D2 #D29A3F

analogous

#3FC0D2 #3F77D2 #503FD2

triadic

#3F77D2 #D23F77 #77D23F

tetradic

#3F77D2 #D23FC0 #D29A3F #3FD250

square

#3F77D2 #D23FC0 #D29A3F #3FD250

split-complementary

#3F77D2 #D2503F #C0D23F

monochromatic

#1D407A #285AAC #3F77D2 #719ADE #A2BDE9

Accessibility & contrast

On white

4.39

#3F77D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#3F77D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77D2

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77D2	#FFFFFF	#000000	##000000
##3F77D2	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B80D6

Deuteranopia (green-blind)

#3072D0

Tritanopia (blue-blind)

#008C9A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f77d2;
/* rgb */ color: rgb(63, 119, 210);
/* oklch */ color: oklch(57.8% 0.152 259.7);

Tailwind

colors: {
  custom: {
    50: '#859de0',
    500: '#3f77d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f77d2;
$custom-light: #859de0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77d2",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 210
  },
  "hsl": {
    "h": 217.143,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.5775,
    "c": 0.15216,
    "h": 259.7
  },
  "luminance": 0.18904
}

Semantic roles & 50–950 ramp

primary

#3F77D2

secondary

#D6BE97

accent

#A743E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77D2

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

Preview Lab → · Contrast checker → · Palette generator →