#3990DD#3990DD

#3990DD is a light, vivid cyan. Relative luminance 0.260; OKLCH L 63.7% C 0.142 H 248.8°. Best body text is #000000 at 6.21:1 contrast (WCAG AA passes).

Color values

HEX	#3990DD
RGB	rgb(57, 144, 221)
HSL	hsl(208, 71%, 55%)
HSV	hsv(208, 74%, 87%)
CMYK	cmyk(74.2%, 34.8%, 0%, 13.3%)
CIE-LAB	lab(58.07, -0.16, -46.63)
CIE-LCH	lch(58.07, 46.63, 269.80°)
OKLab	oklab(63.73% -0.0514 -0.1326)
OKLCH	oklch(63.73% 0.142 248.8)
XYZ	xyz(24.7068, 26.0340, 72.1155)
Luminance	0.2604 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3990DD #DD8639

analogous

#39DDD8 #3990DD #393EDD

triadic

#3990DD #DD3990 #90DD39

tetradic

#3990DD #D839DD #DD8639 #3EDD39

square

#3990DD #D839DD #DD8639 #3EDD39

split-complementary

#3990DD #DD393E #DDD839

monochromatic

#175185 #2071B9 #3990DD #6DADE6 #A1CBEF

Accessibility & contrast

On white

3.38

#3990DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.21

#3990DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3990DD

6.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3990DD	#FFFFFF	#000000	##000000
##3990DD	1.00	3.38	6.21	6.21
#FFFFFF	3.38	1.00	21.00	21.00
#000000	6.21	21.00	1.00	1.00
##000000	6.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D94E0

Deuteranopia (green-blind)

#5585DC

Tritanopia (blue-blind)

#00A2AC

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #3990dd;
/* rgb */ color: rgb(57, 144, 221);
/* oklch */ color: oklch(63.7% 0.142 248.8);

Tailwind

colors: {
  custom: {
    50: '#84b0e8',
    500: '#3990dd',
    950: '#000000',
  },
}

SCSS

$custom: #3990dd;
$custom-light: #84b0e8;
$custom-dark: #000000;

JSON

{
  "hex": "#3990dd",
  "rgb": {
    "r": 57,
    "g": 144,
    "b": 221
  },
  "hsl": {
    "h": 208.171,
    "s": 70.69,
    "l": 54.51
  },
  "oklch": {
    "l": 0.63732,
    "c": 0.1422,
    "h": 248.8
  },
  "luminance": 0.26037
}

Semantic roles & 50–950 ramp

primary

#3990DD

secondary

#DCB796

accent

#8E3AED

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0C1016

muted

#7D7F84

Preview Lab

Preview with #3990DD

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

Preview Lab → · Contrast checker → · Palette generator →