#3F7DCB#3F7DCB

#3F7DCB is a mid, vivid cyan. Relative luminance 0.200; OKLCH L 58.6% C 0.136 H 255.4°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX#3F7DCB
RGBrgb(63, 125, 203)
HSLhsl(213, 57%, 52%)
HSVhsv(213, 69%, 80%)
CMYKcmyk(69%, 38.4%, 0%, 20.4%)
CIE-LABlab(51.88, 5.62, -46.30)
CIE-LCHlch(51.88, 46.63, 276.92°)
OKLaboklab(58.63% -0.0344 -0.1318)
OKLCHoklch(58.63% 0.136 255.4)
XYZxyz(20.1591, 20.0337, 59.2928)
Luminance0.2004 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F7DCB #CB8D3F
analogous
#3FC3CB #3F7DCB #473FCB
triadic
#3F7DCB #CB3F7D #7DCB3F
tetradic
#3F7DCB #CB3FC3 #CB8D3F #3FCB47
square
#3F7DCB #CB3FC3 #CB8D3F #3FCB47
split-complementary
#3F7DCB #CB473F #C3CB3F
monochromatic
#1F4371 #2C60A1 #3F7DCB #6F9ED8 #9FBEE5

Accessibility & contrast

On white

4.19
#3F7DCB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.01
#3F7DCB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7DCB
5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F7DCB#FFFFFF#000000##000000
##3F7DCB1.004.195.015.01
#FFFFFF4.191.0021.0021.00
#0000005.0121.001.001.00
##0000005.0121.001.001.00

Color blindness preview

Protanopia (red-blind)
#5A83CE
Deuteranopia (green-blind)
#4476C9
Tritanopia (blue-blind)
#008F9A
Achromatopsia (no color)
#7C7C7C

Design tokens & code

CSS
--color: #3f7dcb;
/* rgb */ color: rgb(63, 125, 203);
/* oklch */ color: oklch(58.6% 0.136 255.4);
Tailwind
colors: {
  custom: {
    50: '#83a2db',
    500: '#3f7dcb',
    950: '#000000',
  },
}
SCSS
$custom: #3f7dcb;
$custom-light: #83a2db;
$custom-dark: #000000;
JSON
{
  "hex": "#3f7dcb",
  "rgb": {
    "r": 63,
    "g": 125,
    "b": 203
  },
  "hsl": {
    "h": 213.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58634,
    "c": 0.13624,
    "h": 255.4
  },
  "luminance": 0.20036
}

Semantic roles & 50–950 ramp

primary
#3F7DCB
secondary
#D1B694
accent
#9D47E1
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0F15
muted
#7D7E83

Preview Lab

Preview with #3F7DCB

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

Preview Lab → · Contrast checker → · Palette generator →

#3F7DCB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva