#3991D2#3991D2

#3991D2 is a light, vivid cyan. Relative luminance 0.258; OKLCH L 63.4% C 0.128 H 244.4°. Best body text is #000000 at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#3991D2
RGB	rgb(57, 145, 210)
HSL	hsl(205, 63%, 52%)
HSV	hsv(205, 73%, 82%)
CMYK	cmyk(72.9%, 31%, 0%, 17.6%)
CIE-LAB	lab(57.82, -4.63, -40.87)
CIE-LCH	lch(57.82, 41.13, 263.54°)
OKLab	oklab(63.36% -0.0554 -0.1158)
OKLCH	oklch(63.36% 0.128 244.4)
XYZ	xyz(23.4411, 25.7711, 64.6992)
Luminance	0.2577 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991D2 #D27A39

analogous

#39D2C6 #3991D2 #3945D2

triadic

#3991D2 #D23991 #91D239

tetradic

#3991D2 #C639D2 #D27A39 #45D239

square

#3991D2 #C639D2 #D27A39 #45D239

split-complementary

#3991D2 #D23945 #D2C639

monochromatic

#1B4F76 #2671A8 #3991D2 #6BADDD #9DC8E9

Accessibility & contrast

On white

3.41

#3991D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.15

#3991D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991D2

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991D2	#FFFFFF	#000000	##000000
##3991D2	1.00	3.41	6.15	6.15
#FFFFFF	3.41	1.00	21.00	21.00
#000000	6.15	21.00	1.00	1.00
##000000	6.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7393D5

Deuteranopia (green-blind)

#5E84D1

Tritanopia (blue-blind)

#00A1A8

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #3991d2;
/* rgb */ color: rgb(57, 145, 210);
/* oklch */ color: oklch(63.4% 0.128 244.4);

Tailwind

colors: {
  custom: {
    50: '#83b1e0',
    500: '#3991d2',
    950: '#000000',
  },
}

SCSS

$custom: #3991d2;
$custom-light: #83b1e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3991d2",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 210
  },
  "hsl": {
    "h": 205.49,
    "s": 62.963,
    "l": 52.353
  },
  "oklch": {
    "l": 0.63359,
    "c": 0.12835,
    "h": 244.4
  },
  "luminance": 0.25774
}

Semantic roles & 50–950 ramp

primary

#3991D2

secondary

#D5AE92

accent

#8842E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3991D2

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

Preview Lab → · Contrast checker → · Palette generator →