#3F7FB2#3F7FB2

#3F7FB2 is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.7% C 0.103 H 245.0°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3F7FB2
RGB	rgb(63, 127, 178)
HSL	hsl(207, 48%, 47%)
HSV	hsv(207, 65%, 70%)
CMYK	cmyk(64.6%, 28.7%, 0%, 30.2%)
CIE-LAB	lab(51.21, -4.31, -33.03)
CIE-LCH	lch(51.21, 33.31, 262.57°)
OKLab	oklab(57.7% -0.0434 -0.0931)
OKLCH	oklch(57.7% 0.103 245)
XYZ	xyz(17.6721, 19.4481, 44.9334)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7FB2 #B2723F

analogous

#3FB2AC #3F7FB2 #3F45B2

triadic

#3F7FB2 #B23F7F #7FB23F

tetradic

#3F7FB2 #AC3FB2 #B2723F #45B23F

square

#3F7FB2 #AC3FB2 #B2723F #45B23F

split-complementary

#3F7FB2 #B23F45 #B2AC3F

monochromatic

#1F3E58 #2F5F85 #3F7FB2 #669DC9 #93BAD9

Accessibility & contrast

On white

4.29

#3F7FB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#3F7FB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7FB2

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7FB2	#FFFFFF	#000000	##000000
##3F7FB2	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6880B4

Deuteranopia (green-blind)

#5975B1

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f7fb2;
/* rgb */ color: rgb(63, 127, 178);
/* oklch */ color: oklch(57.7% 0.103 245.0);

Tailwind

colors: {
  custom: {
    50: '#7fa3c9',
    500: '#3f7fb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f7fb2;
$custom-light: #7fa3c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7fb2",
  "rgb": {
    "r": 63,
    "g": 127,
    "b": 178
  },
  "hsl": {
    "h": 206.609,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.57701,
    "c": 0.10271,
    "h": 245
  },
  "luminance": 0.1945
}

Semantic roles & 50–950 ramp

primary

#3F7FB2

secondary

#C4A389

accent

#8C50D7

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3F7FB2

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

Preview Lab → · Contrast checker → · Palette generator →