#3B9BF4#3B9BF4

#3B9BF4 is a light, vivid cyan. Relative luminance 0.309; OKLCH L 67.5% C 0.159 H 250.1°. Best body text is #000000 at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#3B9BF4
RGB	rgb(59, 155, 244)
HSL	hsl(209, 89%, 59%)
HSV	hsv(209, 76%, 96%)
CMYK	cmyk(75.8%, 36.5%, 0%, 4.3%)
CIE-LAB	lab(62.42, 1.82, -52.46)
CIE-LCH	lch(62.42, 52.49, 271.99°)
OKLab	oklab(67.55% -0.0541 -0.1495)
OKLCH	oklch(67.55% 0.159 250.1)
XYZ	xyz(29.8479, 30.9006, 89.9617)
Luminance	0.3090 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B9BF4 #F4943B

analogous

#3BF4F1 #3B9BF4 #3B3FF4

triadic

#3B9BF4 #F43B9B #9BF43B

tetradic

#3B9BF4 #F13BF4 #F4943B #3FF43B

square

#3B9BF4 #F13BF4 #F4943B #3FF43B

split-complementary

#3B9BF4 #F43B3F #F4F13B

monochromatic

#0A5DAB #0D7DE5 #3B9BF4 #75B9F7 #AFD6FB

Accessibility & contrast

On white

2.92

#3B9BF4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.18

#3B9BF4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #3B9BF4

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B9BF4	#FFFFFF	#000000	##000000
##3B9BF4	1.00	2.92	7.18	7.18
#FFFFFF	2.92	1.00	21.00	21.00
#000000	7.18	21.00	1.00	1.00
##000000	7.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#71A0F8

Deuteranopia (green-blind)

#558FF2

Tritanopia (blue-blind)

#00B0BC

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #3b9bf4;
/* rgb */ color: rgb(59, 155, 244);
/* oklch */ color: oklch(67.5% 0.159 250.1);

Tailwind

colors: {
  custom: {
    50: '#89b8f8',
    500: '#3b9bf4',
    950: '#000000',
  },
}

SCSS

$custom: #3b9bf4;
$custom-light: #89b8f8;
$custom-dark: #000000;

JSON

{
  "hex": "#3b9bf4",
  "rgb": {
    "r": 59,
    "g": 155,
    "b": 244
  },
  "hsl": {
    "h": 208.865,
    "s": 89.372,
    "l": 59.412
  },
  "oklch": {
    "l": 0.67547,
    "c": 0.15897,
    "h": 250.1
  },
  "luminance": 0.30904
}

Semantic roles & 50–950 ramp

primary

#3B9BF4

secondary

#E9C4A1

accent

#9029FF

background

#F9FBFF

surface

#F2F6FF

border

#CCD0D7

text

#0D1117

muted

#7E8085

Preview Lab

Preview with #3B9BF4

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

Preview Lab → · Contrast checker → · Palette generator →