#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
RGB	rgb(63, 125, 203)
HSL	hsl(213, 57%, 52%)
HSV	hsv(213, 69%, 80%)
CMYK	cmyk(69%, 38.4%, 0%, 20.4%)
CIE-LAB	lab(51.88, 5.62, -46.30)
CIE-LCH	lch(51.88, 46.63, 276.92°)
OKLab	oklab(58.63% -0.0344 -0.1318)
OKLCH	oklch(58.63% 0.136 255.4)
XYZ	xyz(20.1591, 20.0337, 59.2928)
Luminance	0.2004 (WCAG relative)
Temperature	cool
Family	cyan

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
##3F7DCB	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

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 →