#3F7DB0#3F7DB0

#3F7DB0 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.1% C 0.102 H 245.7°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F7DB0
RGB	rgb(63, 125, 176)
HSL	hsl(207, 47%, 47%)
HSV	hsv(207, 64%, 69%)
CMYK	cmyk(64.2%, 29%, 0%, 31%)
CIE-LAB	lab(50.52, -3.81, -32.95)
CIE-LCH	lch(50.52, 33.17, 263.40°)
OKLab	oklab(57.13% -0.0419 -0.0929)
OKLCH	oklch(57.13% 0.102 245.7)
XYZ	xyz(17.2171, 18.8569, 43.7983)
Luminance	0.1886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7DB0 #B0723F

analogous

#3FB0AB #3F7DB0 #3F45B0

triadic

#3F7DB0 #B03F7D #7DB03F

tetradic

#3F7DB0 #AB3FB0 #B0723F #45B03F

square

#3F7DB0 #AB3FB0 #B0723F #45B03F

split-complementary

#3F7DB0 #B03F45 #B0AB3F

monochromatic

#1F3D56 #2F5D83 #3F7DB0 #659BC8 #92B8D8

Accessibility & contrast

On white

4.40

#3F7DB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#3F7DB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7DB0

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7DB0	#FFFFFF	#000000	##000000
##3F7DB0	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677EB2

Deuteranopia (green-blind)

#5773AF

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f7db0;
/* rgb */ color: rgb(63, 125, 176);
/* oklch */ color: oklch(57.1% 0.102 245.7);

Tailwind

colors: {
  custom: {
    50: '#7fa2c8',
    500: '#3f7db0',
    950: '#000000',
  },
}

SCSS

$custom: #3f7db0;
$custom-light: #7fa2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7db0",
  "rgb": {
    "r": 63,
    "g": 125,
    "b": 176
  },
  "hsl": {
    "h": 207.08,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.57127,
    "c": 0.10188,
    "h": 245.7
  },
  "luminance": 0.18859
}

Semantic roles & 50–950 ramp

primary

#3F7DB0

secondary

#C3A388

accent

#8D51D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #3F7DB0

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

Preview Lab → · Contrast checker → · Palette generator →