#3F7BCF#3F7BCF

#3F7BCF is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.4% C 0.144 H 257.3°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BCF
RGB	rgb(63, 123, 207)
HSL	hsl(215, 60%, 53%)
HSV	hsv(215, 70%, 81%)
CMYK	cmyk(69.6%, 40.6%, 0%, 18.8%)
CIE-LAB	lab(51.53, 8.26, -49.13)
CIE-LCH	lch(51.53, 49.82, 279.55°)
OKLab	oklab(58.43% -0.0316 -0.1401)
OKLCH	oklch(58.43% 0.144 257.3)
XYZ	xyz(20.3912, 19.7255, 61.7521)
Luminance	0.1973 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BCF #CF933F

analogous

#3FC3CF #3F7BCF #4B3FCF

triadic

#3F7BCF #CF3F7B #7BCF3F

tetradic

#3F7BCF #CF3FC3 #CF933F #3FCF4B

square

#3F7BCF #CF3FC3 #CF933F #3FCF4B

split-complementary

#3F7BCF #CF4B3F #C3CF3F

monochromatic

#1E4276 #2A5EA7 #3F7BCF #709DDB #A1BEE7

Accessibility & contrast

On white

4.25

#3F7BCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#3F7BCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BCF

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BCF	#FFFFFF	#000000	##000000
##3F7BCF	1.00	4.25	4.95	4.95
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5482D2

Deuteranopia (green-blind)

#3D75CD

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3f7bcf;
/* rgb */ color: rgb(63, 123, 207);
/* oklch */ color: oklch(58.4% 0.144 257.3);

Tailwind

colors: {
  custom: {
    50: '#84a0de',
    500: '#3f7bcf',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bcf;
$custom-light: #84a0de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bcf",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 207
  },
  "hsl": {
    "h": 215,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58433,
    "c": 0.14368,
    "h": 257.3
  },
  "luminance": 0.19728
}

Semantic roles & 50–950 ramp

primary

#3F7BCF

secondary

#D4BA96

accent

#A145E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BCF

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

Preview Lab → · Contrast checker → · Palette generator →