#3F7DD5#3F7DD5

#3F7DD5 is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.2% C 0.149 H 257.5°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#3F7DD5
RGB	rgb(63, 125, 213)
HSL	hsl(215, 64%, 54%)
HSV	hsv(215, 70%, 84%)
CMYK	cmyk(70.4%, 41.3%, 0%, 16.5%)
CIE-LAB	lab(52.43, 9.19, -51.09)
CIE-LCH	lch(52.43, 51.91, 280.19°)
OKLab	oklab(59.24% -0.0322 -0.1459)
OKLCH	oklch(59.24% 0.149 257.5)
XYZ	xyz(21.3894, 20.5258, 65.7725)
Luminance	0.2053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7DD5 #D5973F

analogous

#3FC8D5 #3F7DD5 #4C3FD5

triadic

#3F7DD5 #D53F7D #7DD53F

tetradic

#3F7DD5 #D53FC8 #D5973F #3FD54C

square

#3F7DD5 #D53FC8 #D5973F #3FD54C

split-complementary

#3F7DD5 #D54C3F #C8D53F

monochromatic

#1C447E #275FB0 #3F7DD5 #719FE0 #A3C1EB

Accessibility & contrast

On white

4.11

#3F7DD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#3F7DD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7DD5

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7DD5	#FFFFFF	#000000	##000000
##3F7DD5	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5385D8

Deuteranopia (green-blind)

#3B77D3

Tritanopia (blue-blind)

#00919E

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3f7dd5;
/* rgb */ color: rgb(63, 125, 213);
/* oklch */ color: oklch(59.2% 0.149 257.5);

Tailwind

colors: {
  custom: {
    50: '#85a2e2',
    500: '#3f7dd5',
    950: '#000000',
  },
}

SCSS

$custom: #3f7dd5;
$custom-light: #85a2e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7dd5",
  "rgb": {
    "r": 63,
    "g": 125,
    "b": 213
  },
  "hsl": {
    "h": 215.2,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.59242,
    "c": 0.1494,
    "h": 257.5
  },
  "luminance": 0.20528
}

Semantic roles & 50–950 ramp

primary

#3F7DD5

secondary

#D8BD98

accent

#A241E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0F15

muted

#7D7E83

Preview Lab

Preview with #3F7DD5

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

Preview Lab → · Contrast checker → · Palette generator →