#3B9BDD#3B9BDD

#3B9BDD is a light, vivid cyan. Relative luminance 0.296; OKLCH L 66.3% C 0.132 H 242.8°. Best body text is #000000 at 6.92:1 contrast (WCAG AA passes).

Color values

HEX	#3B9BDD
RGB	rgb(59, 155, 221)
HSL	hsl(204, 70%, 55%)
HSV	hsv(204, 73%, 87%)
CMYK	cmyk(73.3%, 29.9%, 0%, 13.3%)
CIE-LAB	lab(61.30, -6.25, -41.53)
CIE-LCH	lch(61.30, 42.00, 261.44°)
OKLab	oklab(66.29% -0.0604 -0.1176)
OKLCH	oklch(66.29% 0.132 242.8)
XYZ	xyz(26.5711, 29.5899, 72.7036)
Luminance	0.2959 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B9BDD #DD7D3B

analogous

#3BDDCE #3B9BDD #3B4ADD

triadic

#3B9BDD #DD3B9B #9BDD3B

tetradic

#3B9BDD #CE3BDD #DD7D3B #4ADD3B

square

#3B9BDD #CE3BDD #DD7D3B #4ADD3B

split-complementary

#3B9BDD #DD3B4A #DDCE3B

monochromatic

#175986 #207CBA #3B9BDD #6FB6E6 #A3D0EF

Accessibility & contrast

On white

3.04

#3B9BDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.92

#3B9BDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3B9BDD

6.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B9BDD	#FFFFFF	#000000	##000000
##3B9BDD	1.00	3.04	6.92	6.92
#FFFFFF	3.04	1.00	21.00	21.00
#000000	6.92	21.00	1.00	1.00
##000000	6.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D9CE0

Deuteranopia (green-blind)

#668DDC

Tritanopia (blue-blind)

#00ABB2

Achromatopsia (no color)

#949494

Design tokens & code

CSS

--color: #3b9bdd;
/* rgb */ color: rgb(59, 155, 221);
/* oklch */ color: oklch(66.3% 0.132 242.8);

Tailwind

colors: {
  custom: {
    50: '#85b8e8',
    500: '#3b9bdd',
    950: '#000000',
  },
}

SCSS

$custom: #3b9bdd;
$custom-light: #85b8e8;
$custom-dark: #000000;

JSON

{
  "hex": "#3b9bdd",
  "rgb": {
    "r": 59,
    "g": 155,
    "b": 221
  },
  "hsl": {
    "h": 204.444,
    "s": 70.435,
    "l": 54.902
  },
  "oklch": {
    "l": 0.66293,
    "c": 0.13219,
    "h": 242.8
  },
  "luminance": 0.29593
}

Semantic roles & 50–950 ramp

primary

#3B9BDD

secondary

#DCB498

accent

#833BED

background

#F8FBFE

surface

#F0F6FC

border

#CBD0D5

text

#0D1116

muted

#7D8084

Preview Lab

Preview with #3B9BDD

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

Preview Lab → · Contrast checker → · Palette generator →