#3F99BF#3F99BF

#3F99BF is a light, moderate cyan. Relative luminance 0.276; OKLCH L 64.5% C 0.102 H 229.3°. Best body text is #000000 at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#3F99BF
RGB	rgb(63, 153, 191)
HSL	hsl(198, 50%, 50%)
HSV	hsv(198, 67%, 75%)
CMYK	cmyk(67%, 19.9%, 0%, 25.1%)
CIE-LAB	lab(59.52, -14.68, -27.51)
CIE-LCH	lch(59.52, 31.18, 241.92°)
OKLab	oklab(64.49% -0.0663 -0.077)
OKLCH	oklch(64.49% 0.102 229.3)
XYZ	xyz(22.8414, 27.5984, 53.4033)
Luminance	0.2760 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99BF #BF653F

analogous

#3FBFA5 #3F99BF #3F59BF

triadic

#3F99BF #BF3F99 #99BF3F

tetradic

#3F99BF #A53FBF #BF653F #59BF3F

square

#3F99BF #A53FBF #BF653F #59BF3F

split-complementary

#3F99BF #BF3F59 #BFA53F

monochromatic

#214F63 #307491 #3F99BF #6DB2CF #9BCADE

Accessibility & contrast

On white

3.22

#3F99BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.52

#3F99BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99BF

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99BF	#FFFFFF	#000000	##000000
##3F99BF	1.00	3.22	6.52	6.52
#FFFFFF	3.22	1.00	21.00	21.00
#000000	6.52	21.00	1.00	1.00
##000000	6.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8597C1

Deuteranopia (green-blind)

#748ABE

Tritanopia (blue-blind)

#00A4A6

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3f99bf;
/* rgb */ color: rgb(63, 153, 191);
/* oklch */ color: oklch(64.5% 0.102 229.3);

Tailwind

colors: {
  custom: {
    50: '#82b7d2',
    500: '#3f99bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f99bf;
$custom-light: #82b7d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99bf",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 191
  },
  "hsl": {
    "h": 197.813,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.64487,
    "c": 0.10163,
    "h": 229.3
  },
  "luminance": 0.27601
}

Semantic roles & 50–950 ramp

primary

#3F99BF

secondary

#CAA190

accent

#774EDA

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1114

muted

#7D8082

Preview Lab

Preview with #3F99BF

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

Preview Lab → · Contrast checker → · Palette generator →