#3F77CD#3F77CD

#3F77CD is a mid, vivid blue. Relative luminance 0.187; OKLCH L 57.4% C 0.145 H 258.8°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3F77CD
RGB	rgb(63, 119, 205)
HSL	hsl(216, 59%, 53%)
HSV	hsv(216, 69%, 80%)
CMYK	cmyk(69.3%, 42%, 0%, 19.6%)
CIE-LAB	lab(50.28, 10.01, -49.97)
CIE-LCH	lch(50.28, 50.96, 281.33°)
OKLab	oklab(57.43% -0.0283 -0.1427)
OKLCH	oklch(57.43% 0.145 258.8)
XYZ	xyz(19.6622, 18.6561, 60.3105)
Luminance	0.1866 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77CD #CD953F

analogous

#3FBECD #3F77CD #4E3FCD

triadic

#3F77CD #CD3F77 #77CD3F

tetradic

#3F77CD #CD3FBE #CD953F #3FCD4E

square

#3F77CD #CD3FBE #CD953F #3FCD4E

split-complementary

#3F77CD #CD4E3F #BECD3F

monochromatic

#1E4074 #2B5BA4 #3F77CD #7099DA #A0BCE6

Accessibility & contrast

On white

4.44

#3F77CD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#3F77CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77CD

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77CD	#FFFFFF	#000000	##000000
##3F77CD	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7FD0

Deuteranopia (green-blind)

#3772CB

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f77cd;
/* rgb */ color: rgb(63, 119, 205);
/* oklch */ color: oklch(57.4% 0.145 258.8);

Tailwind

colors: {
  custom: {
    50: '#849ddd',
    500: '#3f77cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f77cd;
$custom-light: #849ddd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77cd",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 205
  },
  "hsl": {
    "h": 216.338,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.57433,
    "c": 0.14547,
    "h": 258.8
  },
  "luminance": 0.18658
}

Semantic roles & 50–950 ramp

primary

#3F77CD

secondary

#D3BA95

accent

#A446E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77CD

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

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