#3F9BD9#3F9BD9

#3F9BD9 is a light, vivid cyan. Relative luminance 0.295; OKLCH L 66.2% C 0.126 H 241.9°. Best body text is #000000 at 6.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F9BD9
RGB	rgb(63, 155, 217)
HSL	hsl(204, 67%, 55%)
HSV	hsv(204, 71%, 85%)
CMYK	cmyk(71%, 28.6%, 0%, 14.9%)
CIE-LAB	lab(61.23, -7.09, -39.42)
CIE-LCH	lch(61.23, 40.05, 259.80°)
OKLab	oklab(66.21% -0.0595 -0.1114)
OKLCH	oklch(66.21% 0.126 241.9)
XYZ	xyz(26.2908, 29.5063, 69.9419)
Luminance	0.2951 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9BD9 #D97D3F

analogous

#3FD9CA #3F9BD9 #3F4ED9

triadic

#3F9BD9 #D93F9B #9BD93F

tetradic

#3F9BD9 #CA3FD9 #D97D3F #4ED93F

square

#3F9BD9 #CA3FD9 #D97D3F #4ED93F

split-complementary

#3F9BD9 #D93F4E #D9CA3F

monochromatic

#1A5984 #247CB7 #3F9BD9 #72B6E3 #A5D0ED

Accessibility & contrast

On white

3.04

#3F9BD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.90

#3F9BD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9BD9

6.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9BD9	#FFFFFF	#000000	##000000
##3F9BD9	1.00	3.04	6.90	6.90
#FFFFFF	3.04	1.00	21.00	21.00
#000000	6.90	21.00	1.00	1.00
##000000	6.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F9CDC

Deuteranopia (green-blind)

#698DD8

Tritanopia (blue-blind)

#00AAB1

Achromatopsia (no color)

#949494

Design tokens & code

CSS

--color: #3f9bd9;
/* rgb */ color: rgb(63, 155, 217);
/* oklch */ color: oklch(66.2% 0.126 241.9);

Tailwind

colors: {
  custom: {
    50: '#86b8e5',
    500: '#3f9bd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f9bd9;
$custom-light: #86b8e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9bd9",
  "rgb": {
    "r": 63,
    "g": 155,
    "b": 217
  },
  "hsl": {
    "h": 204.156,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.66206,
    "c": 0.12626,
    "h": 241.9
  },
  "luminance": 0.29509
}

Semantic roles & 50–950 ramp

primary

#3F9BD9

secondary

#DAB49A

accent

#833EEA

background

#F8FBFE

surface

#F0F6FC

border

#CBD0D5

text

#0D1115

muted

#7D8084

Preview Lab

Preview with #3F9BD9

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

Preview Lab → · Contrast checker → · Palette generator →