#3991D6#3991D6

#3991D6 is a light, vivid cyan. Relative luminance 0.260; OKLCH L 63.6% C 0.133 H 245.9°. Best body text is #000000 at 6.20:1 contrast (WCAG AA passes).

Color values

HEX	#3991D6
RGB	rgb(57, 145, 214)
HSL	hsl(206, 66%, 53%)
HSV	hsv(206, 73%, 84%)
CMYK	cmyk(73.4%, 32.2%, 0%, 16.1%)
CIE-LAB	lab(58.01, -3.22, -42.81)
CIE-LCH	lch(58.01, 42.93, 265.69°)
OKLab	oklab(63.57% -0.0543 -0.1214)
OKLCH	oklch(63.57% 0.133 245.9)
XYZ	xyz(23.9457, 25.9730, 67.3566)
Luminance	0.2598 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991D6 #D67E39

analogous

#39D6CC #3991D6 #3943D6

triadic

#3991D6 #D63991 #91D639

tetradic

#3991D6 #CC39D6 #D67E39 #43D639

square

#3991D6 #CC39D6 #D67E39 #43D639

split-complementary

#3991D6 #D63943 #D6CC39

monochromatic

#19507B #2471AE #3991D6 #6CADE0 #9EC9EB

Accessibility & contrast

On white

3.39

#3991D6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.20

#3991D6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991D6

6.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991D6	#FFFFFF	#000000	##000000
##3991D6	1.00	3.39	6.20	6.20
#FFFFFF	3.39	1.00	21.00	21.00
#000000	6.20	21.00	1.00	1.00
##000000	6.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7194D9

Deuteranopia (green-blind)

#5B85D5

Tritanopia (blue-blind)

#00A2AA

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #3991d6;
/* rgb */ color: rgb(57, 145, 214);
/* oklch */ color: oklch(63.6% 0.133 245.9);

Tailwind

colors: {
  custom: {
    50: '#83b0e3',
    500: '#3991d6',
    950: '#000000',
  },
}

SCSS

$custom: #3991d6;
$custom-light: #83b0e3;
$custom-dark: #000000;

JSON

{
  "hex": "#3991d6",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 214
  },
  "hsl": {
    "h": 206.369,
    "s": 65.69,
    "l": 53.137
  },
  "oklch": {
    "l": 0.63573,
    "c": 0.13298,
    "h": 245.9
  },
  "luminance": 0.25976
}

Semantic roles & 50–950 ramp

primary

#3991D6

secondary

#D7B194

accent

#8A3FE9

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3991D6

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

Preview Lab → · Contrast checker → · Palette generator →