#3F637A#3F637A

#3F637A is a mid, muted cyan. Relative luminance 0.114; OKLCH L 48.2% C 0.056 H 237.5°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F637A
RGB	rgb(63, 99, 122)
HSL	hsl(203, 32%, 36%)
HSV	hsv(203, 48%, 48%)
CMYK	cmyk(48.4%, 18.9%, 0%, 52.2%)
CIE-LAB	lab(40.22, -6.11, -16.90)
CIE-LCH	lch(40.22, 17.97, 250.14°)
OKLab	oklab(48.21% -0.0298 -0.0469)
OKLCH	oklch(48.21% 0.056 237.5)
XYZ	xyz(10.0234, 11.3849, 20.0779)
Luminance	0.1139 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F637A #7A563F

analogous

#3F7A74 #3F637A #3F467A

triadic

#3F637A #7A3F63 #637A3F

tetradic

#3F637A #743F7A #7A563F #467A3F

square

#3F637A #743F7A #7A563F #467A3F

split-complementary

#3F637A #7A3F46 #7A743F

monochromatic

#152229 #2A4252 #3F637A #5484A2 #79A1BA

Accessibility & contrast

On white

6.41

#3F637A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3F637A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F637A

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F637A	#FFFFFF	#000000	##FFFFFF
##3F637A	1.00	6.41	3.28	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59627B

Deuteranopia (green-blind)

#515C7A

Tritanopia (blue-blind)

#24696B

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f637a;
/* rgb */ color: rgb(63, 99, 122);
/* oklch */ color: oklch(48.2% 0.056 237.5);

Tailwind

colors: {
  custom: {
    50: '#788fa0',
    500: '#3f637a',
    950: '#000000',
  },
}

SCSS

$custom: #3f637a;
$custom-light: #788fa0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f637a",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 122
  },
  "hsl": {
    "h": 203.39,
    "s": 31.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.48207,
    "c": 0.05557,
    "h": 237.5
  },
  "luminance": 0.11386
}

Semantic roles & 50–950 ramp

primary

#3F637A

secondary

#A48570

accent

#8860C8

background

#F7F8F9

surface

#EDF0F2

border

#C8CBCC

text

#090C0E

muted

#7B7D7E

Preview Lab

Preview with #3F637A

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

Preview Lab → · Contrast checker → · Palette generator →