#3999BC#3999BC

#3999BC is a light, moderate cyan. Relative luminance 0.273; OKLCH L 64.2% C 0.102 H 226.1°. Best body text is #000000 at 6.46:1 contrast (WCAG AA passes).

Color values

HEX#3999BC
RGBrgb(57, 153, 188)
HSLhsl(196, 53%, 48%)
HSVhsv(196, 70%, 74%)
CMYKcmyk(69.7%, 18.6%, 0%, 26.3%)
CIE-LABlab(59.23, -16.58, -26.28)
CIE-LCHlch(59.23, 31.08, 237.75°)
OKLaboklab(64.17% -0.0707 -0.0735)
OKLCHoklch(64.17% 0.102 226.1)
XYZxyz(22.1520, 27.2807, 51.6654)
Luminance0.2728 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3999BC #BC5C39
analogous
#39BC9E #3999BC #3957BC
triadic
#3999BC #BC3999 #99BC39
tetradic
#3999BC #9E39BC #BC5C39 #57BC39
square
#3999BC #9E39BC #BC5C39 #57BC39
split-complementary
#3999BC #BC3957 #BC9E39
monochromatic
#1D4D5E #2B738D #3999BC #63B2D0 #92C9DE

Accessibility & contrast

On white

3.25
#3999BC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.46
#3999BC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999BC
6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3999BC#FFFFFF#000000##000000
##3999BC1.003.256.466.46
#FFFFFF3.251.0021.0021.00
#0000006.4621.001.001.00
##0000006.4621.001.001.00

Color blindness preview

Protanopia (red-blind)
#8696BE
Deuteranopia (green-blind)
#7489BC
Tritanopia (blue-blind)
#00A3A4
Achromatopsia (no color)
#8F8F8F

Design tokens & code

CSS
--color: #3999bc;
/* rgb */ color: rgb(57, 153, 188);
/* oklch */ color: oklch(64.2% 0.102 226.1);
Tailwind
colors: {
  custom: {
    50: '#80b7d0',
    500: '#3999bc',
    950: '#000000',
  },
}
SCSS
$custom: #3999bc;
$custom-light: #80b7d0;
$custom-dark: #000000;
JSON
{
  "hex": "#3999bc",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 188
  },
  "hsl": {
    "h": 196.031,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.64167,
    "c": 0.10205,
    "h": 226.1
  },
  "luminance": 0.27283
}

Semantic roles & 50–950 ramp

primary
#3999BC
secondary
#C99988
accent
#724BDD
background
#F8FBFC
surface
#F0F6F9
border
#CBD0D2
text
#0B1114
muted
#7C8082

Preview Lab

Preview with #3999BC

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

Preview Lab → · Contrast checker → · Palette generator →

#3999BC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva