#3F7FB1#3F7FB1

#3F7FB1 is a mid, moderate cyan. Relative luminance 0.194; OKLCH L 57.6% C 0.102 H 244.5°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3F7FB1
RGB	rgb(63, 127, 177)
HSL	hsl(206, 48%, 47%)
HSV	hsv(206, 64%, 69%)
CMYK	cmyk(64.4%, 28.2%, 0%, 30.6%)
CIE-LAB	lab(51.16, -4.65, -32.52)
CIE-LCH	lch(51.16, 32.85, 261.86°)
OKLab	oklab(57.65% -0.0437 -0.0916)
OKLCH	oklch(57.65% 0.102 244.5)
XYZ	xyz(17.5721, 19.4081, 44.4065)
Luminance	0.1941 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7FB1 #B1713F

analogous

#3FB1AA #3F7FB1 #3F46B1

triadic

#3F7FB1 #B13F7F #7FB13F

tetradic

#3F7FB1 #AA3FB1 #B1713F #46B13F

square

#3F7FB1 #AA3FB1 #B1713F #46B13F

split-complementary

#3F7FB1 #B13F46 #B1AA3F

monochromatic

#1F3E57 #2F5F84 #3F7FB1 #659DC8 #92BAD8

Accessibility & contrast

On white

4.30

#3F7FB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#3F7FB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7FB1

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7FB1	#FFFFFF	#000000	##000000
##3F7FB1	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6980B3

Deuteranopia (green-blind)

#5975B0

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f7fb1;
/* rgb */ color: rgb(63, 127, 177);
/* oklch */ color: oklch(57.6% 0.102 244.5);

Tailwind

colors: {
  custom: {
    50: '#7fa3c8',
    500: '#3f7fb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f7fb1;
$custom-light: #7fa3c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7fb1",
  "rgb": {
    "r": 63,
    "g": 127,
    "b": 177
  },
  "hsl": {
    "h": 206.316,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.57649,
    "c": 0.10152,
    "h": 244.5
  },
  "luminance": 0.1941
}

Semantic roles & 50–950 ramp

primary

#3F7FB1

secondary

#C4A288

accent

#8C51D7

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3F7FB1

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

Preview Lab → · Contrast checker → · Palette generator →