#3F77B2#3F77B2

#3F77B2 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.8% C 0.110 H 251.5°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F77B2
RGB	rgb(63, 119, 178)
HSL	hsl(211, 48%, 47%)
HSV	hsv(211, 65%, 70%)
CMYK	cmyk(64.6%, 33.1%, 0%, 30.2%)
CIE-LAB	lab(48.84, 0.46, -36.75)
CIE-LCH	lch(48.84, 36.75, 270.71°)
OKLab	oklab(55.84% -0.0348 -0.104)
OKLCH	oklch(55.84% 0.11 251.5)
XYZ	xyz(16.6797, 17.4631, 44.6025)
Luminance	0.1746 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77B2 #B27A3F

analogous

#3FB0B2 #3F77B2 #413FB2

triadic

#3F77B2 #B23F77 #77B23F

tetradic

#3F77B2 #B23FB0 #B27A3F #3FB241

square

#3F77B2 #B23FB0 #B27A3F #3FB241

split-complementary

#3F77B2 #B2413F #B0B23F

monochromatic

#1F3B58 #2F5985 #3F77B2 #6696C9 #93B5D9

Accessibility & contrast

On white

4.67

#3F77B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3F77B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F77B2

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77B2	#FFFFFF	#000000	##FFFFFF
##3F77B2	1.00	4.67	4.49	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7AB5

Deuteranopia (green-blind)

#4E6FB1

Tritanopia (blue-blind)

#00858C

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f77b2;
/* rgb */ color: rgb(63, 119, 178);
/* oklch */ color: oklch(55.8% 0.110 251.5);

Tailwind

colors: {
  custom: {
    50: '#7f9dc9',
    500: '#3f77b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f77b2;
$custom-light: #7f9dc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77b2",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 178
  },
  "hsl": {
    "h": 210.783,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.55837,
    "c": 0.10966,
    "h": 251.5
  },
  "luminance": 0.17465
}

Semantic roles & 50–950 ramp

primary

#3F77B2

secondary

#C4A789

accent

#9650D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F77B2

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

Preview Lab → · Contrast checker → · Palette generator →