#3F7DB1#3F7DB1

#3F7DB1 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.2% C 0.103 H 246.2°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F7DB1
RGB	rgb(63, 125, 177)
HSL	hsl(207, 48%, 47%)
HSV	hsv(207, 64%, 69%)
CMYK	cmyk(64.4%, 29.4%, 0%, 30.6%)
CIE-LAB	lab(50.57, -3.47, -33.45)
CIE-LCH	lch(50.57, 33.63, 264.07°)
OKLab	oklab(57.18% -0.0416 -0.0943)
OKLCH	oklch(57.18% 0.103 246.2)
XYZ	xyz(17.3164, 18.8966, 44.3213)
Luminance	0.1890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7DB1 #B1733F

analogous

#3FB1AC #3F7DB1 #3F44B1

triadic

#3F7DB1 #B13F7D #7DB13F

tetradic

#3F7DB1 #AC3FB1 #B1733F #44B13F

square

#3F7DB1 #AC3FB1 #B1733F #44B13F

split-complementary

#3F7DB1 #B13F44 #B1AC3F

monochromatic

#1F3D57 #2F5D84 #3F7DB1 #659BC8 #92B8D8

Accessibility & contrast

On white

4.39

#3F7DB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#3F7DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7DB1

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7DB1	#FFFFFF	#000000	##000000
##3F7DB1	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB3

Deuteranopia (green-blind)

#5773B0

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f7db1;
/* rgb */ color: rgb(63, 125, 177);
/* oklch */ color: oklch(57.2% 0.103 246.2);

Tailwind

colors: {
  custom: {
    50: '#7fa2c8',
    500: '#3f7db1',
    950: '#000000',
  },
}

SCSS

$custom: #3f7db1;
$custom-light: #7fa2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7db1",
  "rgb": {
    "r": 63,
    "g": 125,
    "b": 177
  },
  "hsl": {
    "h": 207.368,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.5718,
    "c": 0.1031,
    "h": 246.2
  },
  "luminance": 0.18898
}

Semantic roles & 50–950 ramp

primary

#3F7DB1

secondary

#C4A388

accent

#8E51D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #3F7DB1

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

Preview Lab → · Contrast checker → · Palette generator →