#3F77B9#3F77B9

#3F77B9 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 56.2% C 0.119 H 253.9°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F77B9
RGB	rgb(63, 119, 185)
HSL	hsl(212, 49%, 49%)
HSV	hsv(212, 66%, 73%)
CMYK	cmyk(65.9%, 35.7%, 0%, 27.5%)
CIE-LAB	lab(49.19, 2.90, -40.23)
CIE-LCH	lch(49.19, 40.34, 274.13°)
OKLab	oklab(56.23% -0.0329 -0.1142)
OKLCH	oklch(56.23% 0.119 253.9)
XYZ	xyz(17.4005, 17.7515, 48.3989)
Luminance	0.1775 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77B9 #B9813F

analogous

#3FB4B9 #3F77B9 #443FB9

triadic

#3F77B9 #B93F77 #77B93F

tetradic

#3F77B9 #B93FB4 #B9813F #3FB944

square

#3F77B9 #B93FB4 #B9813F #3FB944

split-complementary

#3F77B9 #B9443F #B4B93F

monochromatic

#203C5E #2F5A8B #3F77B9 #6997CC #97B6DC

Accessibility & contrast

On white

4.61

#3F77B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3F77B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F77B9

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77B9	#FFFFFF	#000000	##FFFFFF
##3F77B9	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7BBC

Deuteranopia (green-blind)

#4970B8

Tritanopia (blue-blind)

#00868F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f77b9;
/* rgb */ color: rgb(63, 119, 185);
/* oklch */ color: oklch(56.2% 0.119 253.9);

Tailwind

colors: {
  custom: {
    50: '#809dce',
    500: '#3f77b9',
    950: '#000000',
  },
}

SCSS

$custom: #3f77b9;
$custom-light: #809dce;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77b9",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 185
  },
  "hsl": {
    "h": 212.459,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.56231,
    "c": 0.11882,
    "h": 253.9
  },
  "luminance": 0.17753
}

Semantic roles & 50–950 ramp

primary

#3F77B9

secondary

#C7AC8D

accent

#9A4FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F77B9

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

Preview Lab → · Contrast checker → · Palette generator →