#4099BB#4099BB

#4099BB is a light, moderate cyan. Relative luminance 0.275; OKLCH L 64.3% C 0.098 H 226.6°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#4099BB
RGB	rgb(64, 153, 187)
HSL	hsl(197, 49%, 49%)
HSV	hsv(197, 66%, 73%)
CMYK	cmyk(65.8%, 18.2%, 0%, 26.7%)
CIE-LAB	lab(59.40, -15.81, -25.45)
CIE-LCH	lch(59.40, 29.96, 238.15°)
OKLab	oklab(64.34% -0.0672 -0.0711)
OKLCH	oklch(64.34% 0.098 226.6)
XYZ	xyz(22.4716, 27.4579, 51.1197)
Luminance	0.2746 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4099BB #BB6240

analogous

#40BBA0 #4099BB #405CBB

triadic

#4099BB #BB4099 #99BB40

tetradic

#4099BB #A040BB #BB6240 #5CBB40

square

#4099BB #A040BB #BB6240 #5CBB40

split-complementary

#4099BB #BB405C #BBA040

monochromatic

#214E60 #30748D #4099BB #6CB2CD #99CADC

Accessibility & contrast

On white

3.23

#4099BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#4099BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4099BB

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4099BB	#FFFFFF	#000000	##000000
##4099BB	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)

#8796BD

Deuteranopia (green-blind)

#7689BB

Tritanopia (blue-blind)

#00A3A4

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #4099bb;
/* rgb */ color: rgb(64, 153, 187);
/* oklch */ color: oklch(64.3% 0.098 226.6);

Tailwind

colors: {
  custom: {
    50: '#82b7cf',
    500: '#4099bb',
    950: '#000000',
  },
}

SCSS

$custom: #4099bb;
$custom-light: #82b7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4099bb",
  "rgb": {
    "r": 64,
    "g": 153,
    "b": 187
  },
  "hsl": {
    "h": 196.585,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.64341,
    "c": 0.09785,
    "h": 226.6
  },
  "luminance": 0.2746
}

Semantic roles & 50–950 ramp

primary

#4099BB

secondary

#C89F8F

accent

#754FD9

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1113

muted

#7D8082

Preview Lab

Preview with #4099BB

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

Preview Lab → · Contrast checker → · Palette generator →