#4099D9#4099D9

#4099D9 is a light, vivid cyan. Relative luminance 0.289; OKLCH L 65.8% C 0.127 H 243.4°. Best body text is #000000 at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#4099D9
RGB	rgb(64, 153, 217)
HSL	hsl(205, 67%, 55%)
HSV	hsv(205, 71%, 85%)
CMYK	cmyk(70.5%, 29.5%, 0%, 14.9%)
CIE-LAB	lab(60.67, -5.82, -40.28)
CIE-LCH	lch(60.67, 40.70, 261.78°)
OKLab	oklab(65.78% -0.057 -0.1139)
OKLCH	oklch(65.78% 0.127 243.4)
XYZ	xyz(26.0252, 28.8793, 69.8349)
Luminance	0.2888 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4099D9 #D98040

analogous

#40D9CC #4099D9 #404DD9

triadic

#4099D9 #D94099 #99D940

tetradic

#4099D9 #CC40D9 #D98040 #4DD940

square

#4099D9 #CC40D9 #D98040 #4DD940

split-complementary

#4099D9 #D9404D #D9CC40

monochromatic

#1A5884 #247AB7 #4099D9 #73B4E3 #A6D0ED

Accessibility & contrast

On white

3.10

#4099D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.78

#4099D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4099D9

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4099D9	#FFFFFF	#000000	##000000
##4099D9	1.00	3.10	6.78	6.78
#FFFFFF	3.10	1.00	21.00	21.00
#000000	6.78	21.00	1.00	1.00
##000000	6.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C9ADC

Deuteranopia (green-blind)

#678CD8

Tritanopia (blue-blind)

#00A9AF

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #4099d9;
/* rgb */ color: rgb(64, 153, 217);
/* oklch */ color: oklch(65.8% 0.127 243.4);

Tailwind

colors: {
  custom: {
    50: '#87b6e5',
    500: '#4099d9',
    950: '#000000',
  },
}

SCSS

$custom: #4099d9;
$custom-light: #87b6e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4099d9",
  "rgb": {
    "r": 64,
    "g": 153,
    "b": 217
  },
  "hsl": {
    "h": 205.098,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.65779,
    "c": 0.12735,
    "h": 243.4
  },
  "luminance": 0.28882
}

Semantic roles & 50–950 ramp

primary

#4099D9

secondary

#DAB59A

accent

#863EEA

background

#F8FBFE

surface

#F0F6FC

border

#CBD0D5

text

#0D1115

muted

#7D8084

Preview Lab

Preview with #4099D9

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

Preview Lab → · Contrast checker → · Palette generator →