#3F99BC#3F99BC

#3F99BC is a light, moderate cyan. Relative luminance 0.275; OKLCH L 64.4% C 0.099 H 227.2°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#3F99BC
RGB	rgb(63, 153, 188)
HSL	hsl(197, 50%, 49%)
HSV	hsv(197, 66%, 74%)
CMYK	cmyk(66.5%, 18.6%, 0%, 26.3%)
CIE-LAB	lab(59.40, -15.65, -26.00)
CIE-LCH	lch(59.40, 30.35, 238.96°)
OKLab	oklab(64.35% -0.0674 -0.0727)
OKLCH	oklch(64.35% 0.099 227.2)
XYZ	xyz(22.5146, 27.4676, 51.6824)
Luminance	0.2747 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99BC #BC623F

analogous

#3FBCA1 #3F99BC #3F5BBC

triadic

#3F99BC #BC3F99 #99BC3F

tetradic

#3F99BC #A13FBC #BC623F #5BBC3F

square

#3F99BC #A13FBC #BC623F #5BBC3F

split-complementary

#3F99BC #BC3F5B #BCA13F

monochromatic

#204E60 #30748E #3F99BC #6BB2CD #99CADD

Accessibility & contrast

On white

3.23

#3F99BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#3F99BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99BC

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99BC	#FFFFFF	#000000	##000000
##3F99BC	1.00	3.23	6.49	6.49
#FFFFFF	3.23	1.00	21.00	21.00
#000000	6.49	21.00	1.00	1.00
##000000	6.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8696BE

Deuteranopia (green-blind)

#7589BC

Tritanopia (blue-blind)

#00A3A4

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3f99bc;
/* rgb */ color: rgb(63, 153, 188);
/* oklch */ color: oklch(64.4% 0.099 227.2);

Tailwind

colors: {
  custom: {
    50: '#82b7d0',
    500: '#3f99bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f99bc;
$custom-light: #82b7d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99bc",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 188
  },
  "hsl": {
    "h": 196.8,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.64352,
    "c": 0.09915,
    "h": 227.2
  },
  "luminance": 0.2747
}

Semantic roles & 50–950 ramp

primary

#3F99BC

secondary

#C99F8E

accent

#754ED9

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1114

muted

#7D8082

Preview Lab

Preview with #3F99BC

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

Preview Lab → · Contrast checker → · Palette generator →