#3F7DD9#3F7DD9

#3F7DD9 is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.5% C 0.155 H 258.3°. Best body text is #000000 at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#3F7DD9
RGB	rgb(63, 125, 217)
HSL	hsl(216, 67%, 55%)
HSV	hsv(216, 71%, 85%)
CMYK	cmyk(71%, 42.4%, 0%, 14.9%)
CIE-LAB	lab(52.65, 10.62, -52.99)
CIE-LCH	lch(52.65, 54.04, 281.34°)
OKLab	oklab(59.49% -0.0314 -0.1514)
OKLCH	oklch(59.49% 0.155 258.3)
XYZ	xyz(21.9034, 20.7314, 68.4794)
Luminance	0.2073 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7DD9 #D99B3F

analogous

#3FCAD9 #3F7DD9 #4E3FD9

triadic

#3F7DD9 #D93F7D #7DD93F

tetradic

#3F7DD9 #D93FCA #D99B3F #3FD94E

square

#3F7DD9 #D93FCA #D99B3F #3FD94E

split-complementary

#3F7DD9 #D94E3F #CAD93F

monochromatic

#1A4584 #245FB7 #3F7DD9 #72A0E3 #A5C2ED

Accessibility & contrast

On white

4.08

#3F7DD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.15

#3F7DD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7DD9

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7DD9	#FFFFFF	#000000	##000000
##3F7DD9	1.00	4.08	5.15	5.15
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.15	21.00	1.00	1.00
##000000	5.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5185DD

Deuteranopia (green-blind)

#3677D7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3f7dd9;
/* rgb */ color: rgb(63, 125, 217);
/* oklch */ color: oklch(59.5% 0.155 258.3);

Tailwind

colors: {
  custom: {
    50: '#86a2e5',
    500: '#3f7dd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f7dd9;
$custom-light: #86a2e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7dd9",
  "rgb": {
    "r": 63,
    "g": 125,
    "b": 217
  },
  "hsl": {
    "h": 215.844,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.59492,
    "c": 0.15467,
    "h": 258.3
  },
  "luminance": 0.20734
}

Semantic roles & 50–950 ramp

primary

#3F7DD9

secondary

#DAC09A

accent

#A53EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0F16

muted

#7D7E84

Preview Lab

Preview with #3F7DD9

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

Preview Lab → · Contrast checker → · Palette generator →