#3990CC#3990CC

#3990CC is a light, vivid cyan. Relative luminance 0.252; OKLCH L 62.8% C 0.122 H 242.6°. Best body text is #000000 at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#3990CC
RGB	rgb(57, 144, 204)
HSL	hsl(204, 59%, 51%)
HSV	hsv(204, 72%, 80%)
CMYK	cmyk(72.1%, 29.4%, 0%, 20%)
CIE-LAB	lab(57.24, -6.15, -38.40)
CIE-LCH	lch(57.24, 38.89, 260.90°)
OKLab	oklab(62.81% -0.0563 -0.1086)
OKLCH	oklch(62.81% 0.122 242.6)
XYZ	xyz(22.5555, 25.1735, 60.7853)
Luminance	0.2518 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3990CC #CC7539

analogous

#39CCBE #3990CC #3946CC

triadic

#3990CC #CC3990 #90CC39

tetradic

#3990CC #BE39CC #CC7539 #46CC39

square

#3990CC #BE39CC #CC7539 #46CC39

split-complementary

#3990CC #CC3946 #CCBE39

monochromatic

#1C4D6E #296F9F #3990CC #6AABD9 #9AC7E5

Accessibility & contrast

On white

3.48

#3990CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.04

#3990CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3990CC

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3990CC	#FFFFFF	#000000	##000000
##3990CC	1.00	3.48	6.04	6.04
#FFFFFF	3.48	1.00	21.00	21.00
#000000	6.04	21.00	1.00	1.00
##000000	6.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7491CF

Deuteranopia (green-blind)

#6083CB

Tritanopia (blue-blind)

#009FA5

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #3990cc;
/* rgb */ color: rgb(57, 144, 204);
/* oklch */ color: oklch(62.8% 0.122 242.6);

Tailwind

colors: {
  custom: {
    50: '#82b0dc',
    500: '#3990cc',
    950: '#000000',
  },
}

SCSS

$custom: #3990cc;
$custom-light: #82b0dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3990cc",
  "rgb": {
    "r": 57,
    "g": 144,
    "b": 204
  },
  "hsl": {
    "h": 204.49,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.62811,
    "c": 0.12231,
    "h": 242.6
  },
  "luminance": 0.25176
}

Semantic roles & 50–950 ramp

primary

#3990CC

secondary

#D1AA90

accent

#8646E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3990CC

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

Preview Lab → · Contrast checker → · Palette generator →