#3F7BB1#3F7BB1

#3F7BB1 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.105 H 247.9°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BB1
RGB	rgb(63, 123, 177)
HSL	hsl(208, 48%, 47%)
HSV	hsv(208, 64%, 69%)
CMYK	cmyk(64.4%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.97, -2.29, -34.38)
CIE-LCH	lch(49.97, 34.46, 266.19°)
OKLab	oklab(56.71% -0.0394 -0.0971)
OKLCH	oklch(56.71% 0.105 247.9)
XYZ	xyz(17.0657, 18.3953, 44.2377)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BB1 #B1753F

analogous

#3FB1AE #3F7BB1 #3F42B1

triadic

#3F7BB1 #B13F7B #7BB13F

tetradic

#3F7BB1 #AE3FB1 #B1753F #42B13F

square

#3F7BB1 #AE3FB1 #B1753F #42B13F

split-complementary

#3F7BB1 #B13F42 #B1AE3F

monochromatic

#1F3C57 #2F5C84 #3F7BB1 #6599C8 #92B7D8

Accessibility & contrast

On white

4.49

#3F7BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#3F7BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BB1

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BB1	#FFFFFF	#000000	##000000
##3F7BB1	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB3

Deuteranopia (green-blind)

#5472B0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f7bb1;
/* rgb */ color: rgb(63, 123, 177);
/* oklch */ color: oklch(56.7% 0.105 247.9);

Tailwind

colors: {
  custom: {
    50: '#7fa0c8',
    500: '#3f7bb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bb1;
$custom-light: #7fa0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bb1",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 208.421,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.56712,
    "c": 0.10477,
    "h": 247.9
  },
  "luminance": 0.18397
}

Semantic roles & 50–950 ramp

primary

#3F7BB1

secondary

#C4A488

accent

#9051D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F7BB1

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

Preview Lab → · Contrast checker → · Palette generator →