#306BD3#306BD3

#306BD3 is a mid, vivid blue. Relative luminance 0.158; OKLCH L 54.7% C 0.172 H 260.8°. Best body text is #FFFFFF at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#306BD3
RGB	rgb(48, 107, 211)
HSL	hsl(218, 65%, 51%)
HSV	hsv(218, 77%, 83%)
CMYK	cmyk(77.3%, 49.3%, 0%, 17.3%)
CIE-LAB	lab(46.77, 17.79, -59.06)
CIE-LCH	lch(46.77, 61.68, 286.76°)
OKLab	oklab(54.7% -0.0275 -0.1698)
OKLCH	oklch(54.7% 0.172 260.8)
XYZ	xyz(18.2302, 15.8448, 63.7129)
Luminance	0.1585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#306BD3 #D39830

analogous

#30BCD3 #306BD3 #4630D3

triadic

#306BD3 #D3306B #6BD330

tetradic

#306BD3 #D330BC #D39830 #30D346

square

#306BD3 #D330BC #D39830 #30D346

split-complementary

#306BD3 #D34630 #BCD330

monochromatic

#183871 #2351A3 #306BD3 #628FDE #95B3E8

Accessibility & contrast

On white

5.04

#306BD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.17

#306BD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #306BD3

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##306BD3	#FFFFFF	#000000	##FFFFFF
##306BD3	1.00	5.04	4.17	5.04
#FFFFFF	5.04	1.00	21.00	1.00
#000000	4.17	21.00	1.00	21.00
##FFFFFF	5.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D77D7

Deuteranopia (green-blind)

#0068D1

Tritanopia (blue-blind)

#008495

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #306bd3;
/* rgb */ color: rgb(48, 107, 211);
/* oklch */ color: oklch(54.7% 0.172 260.8);

Tailwind

colors: {
  custom: {
    50: '#8094e1',
    500: '#306bd3',
    950: '#000000',
  },
}

SCSS

$custom: #306bd3;
$custom-light: #8094e1;
$custom-dark: #000000;

JSON

{
  "hex": "#306bd3",
  "rgb": {
    "r": 48,
    "g": 107,
    "b": 211
  },
  "hsl": {
    "h": 218.282,
    "s": 64.94,
    "l": 50.784
  },
  "oklch": {
    "l": 0.54698,
    "c": 0.17207,
    "h": 260.8
  },
  "luminance": 0.15847
}

Semantic roles & 50–950 ramp

primary

#306BD3

secondary

#D4B98B

accent

#AB40E8

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #306BD3

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

Preview Lab → · Contrast checker → · Palette generator →