#3990DA#3990DA

#3990DA is a light, vivid cyan. Relative luminance 0.259; OKLCH L 63.6% C 0.139 H 247.9°. Best body text is #000000 at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#3990DA
RGB	rgb(57, 144, 218)
HSL	hsl(208, 69%, 54%)
HSV	hsv(208, 74%, 85%)
CMYK	cmyk(73.9%, 33.9%, 0%, 14.5%)
CIE-LAB	lab(57.92, -1.23, -45.19)
CIE-LCH	lch(57.92, 45.21, 268.44°)
OKLab	oklab(63.57% -0.0522 -0.1284)
OKLCH	oklch(63.57% 0.139 247.9)
XYZ	xyz(24.3107, 25.8755, 70.0293)
Luminance	0.2588 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3990DA #DA8339

analogous

#39DAD4 #3990DA #3940DA

triadic

#3990DA #DA3990 #90DA39

tetradic

#3990DA #D439DA #DA8339 #40DA39

square

#3990DA #D439DA #DA8339 #40DA39

split-complementary

#3990DA #DA3940 #DAD439

monochromatic

#185181 #2271B4 #3990DA #6DADE4 #A0CAED

Accessibility & contrast

On white

3.40

#3990DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.18

#3990DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3990DA

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3990DA	#FFFFFF	#000000	##000000
##3990DA	1.00	3.40	6.18	6.18
#FFFFFF	3.40	1.00	21.00	21.00
#000000	6.18	21.00	1.00	1.00
##000000	6.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E93DD

Deuteranopia (green-blind)

#5784D9

Tritanopia (blue-blind)

#00A2AB

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #3990da;
/* rgb */ color: rgb(57, 144, 218);
/* oklch */ color: oklch(63.6% 0.139 247.9);

Tailwind

colors: {
  custom: {
    50: '#84b0e6',
    500: '#3990da',
    950: '#000000',
  },
}

SCSS

$custom: #3990da;
$custom-light: #84b0e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3990da",
  "rgb": {
    "r": 57,
    "g": 144,
    "b": 218
  },
  "hsl": {
    "h": 207.578,
    "s": 68.511,
    "l": 53.922
  },
  "oklch": {
    "l": 0.63565,
    "c": 0.1386,
    "h": 247.9
  },
  "luminance": 0.25878
}

Semantic roles & 50–950 ramp

primary

#3990DA

secondary

#DAB595

accent

#8D3CEB

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0C1016

muted

#7D7F84

Preview Lab

Preview with #3990DA

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

Preview Lab → · Contrast checker → · Palette generator →