#3F77CE#3F77CE

#3F77CE is a mid, vivid blue. Relative luminance 0.187; OKLCH L 57.5% C 0.147 H 259.0°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F77CE
RGB	rgb(63, 119, 206)
HSL	hsl(217, 59%, 53%)
HSV	hsv(217, 69%, 81%)
CMYK	cmyk(69.4%, 42.2%, 0%, 19.2%)
CIE-LAB	lab(50.34, 10.37, -50.45)
CIE-LCH	lch(50.34, 51.50, 281.62°)
OKLab	oklab(57.5% -0.0281 -0.1441)
OKLCH	oklch(57.5% 0.147 259)
XYZ	xyz(19.7833, 18.7046, 60.9483)
Luminance	0.1871 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77CE #CE963F

analogous

#3FBFCE #3F77CE #4E3FCE

triadic

#3F77CE #CE3F77 #77CE3F

tetradic

#3F77CE #CE3FBF #CE963F #3FCE4E

square

#3F77CE #CE3FBF #CE963F #3FCE4E

split-complementary

#3F77CE #CE4E3F #BFCE3F

monochromatic

#1E4075 #2A5BA6 #3F77CE #709ADA #A1BCE7

Accessibility & contrast

On white

4.43

#3F77CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#3F77CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77CE

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77CE	#FFFFFF	#000000	##000000
##3F77CE	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7FD1

Deuteranopia (green-blind)

#3672CC

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f77ce;
/* rgb */ color: rgb(63, 119, 206);
/* oklch */ color: oklch(57.5% 0.147 259.0);

Tailwind

colors: {
  custom: {
    50: '#849ddd',
    500: '#3f77ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f77ce;
$custom-light: #849ddd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77ce",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 206
  },
  "hsl": {
    "h": 216.503,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.57496,
    "c": 0.1468,
    "h": 259
  },
  "luminance": 0.18707
}

Semantic roles & 50–950 ramp

primary

#3F77CE

secondary

#D3BB95

accent

#A545E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77CE

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

Preview Lab → · Contrast checker → · Palette generator →