#306BBF#306BBF

#306BBF is a mid, vivid blue. Relative luminance 0.149; OKLCH L 53.3% C 0.145 H 257.8°. Best body text is #FFFFFF at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#306BBF
RGB	rgb(48, 107, 191)
HSL	hsl(215, 60%, 47%)
HSV	hsv(215, 75%, 75%)
CMYK	cmyk(74.9%, 44%, 0%, 25.1%)
CIE-LAB	lab(45.50, 10.27, -49.61)
CIE-LCH	lch(45.50, 50.66, 281.70°)
OKLab	oklab(53.31% -0.0308 -0.142)
OKLCH	oklch(53.31% 0.145 257.8)
XYZ	xyz(15.8771, 14.9036, 51.3200)
Luminance	0.1490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#306BBF #BF8430

analogous

#30B3BF #306BBF #3D30BF

triadic

#306BBF #BF306B #6BBF30

tetradic

#306BBF #BF30B3 #BF8430 #30BF3D

square

#306BBF #BF30B3 #BF8430 #30BF3D

split-complementary

#306BBF #BF3D30 #B3BF30

monochromatic

#17345D #24508E #306BBF #578BD5 #88ADE1

Accessibility & contrast

On white

5.28

#306BBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#306BBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #306BBF

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##306BBF	#FFFFFF	#000000	##FFFFFF
##306BBF	1.00	5.28	3.98	5.28
#FFFFFF	5.28	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4173C2

Deuteranopia (green-blind)

#2566BD

Tritanopia (blue-blind)

#007F8B

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #306bbf;
/* rgb */ color: rgb(48, 107, 191);
/* oklch */ color: oklch(53.3% 0.145 257.8);

Tailwind

colors: {
  custom: {
    50: '#7c94d3',
    500: '#306bbf',
    950: '#000000',
  },
}

SCSS

$custom: #306bbf;
$custom-light: #7c94d3;
$custom-dark: #000000;

JSON

{
  "hex": "#306bbf",
  "rgb": {
    "r": 48,
    "g": 107,
    "b": 191
  },
  "hsl": {
    "h": 215.245,
    "s": 59.833,
    "l": 46.863
  },
  "oklch": {
    "l": 0.53314,
    "c": 0.14536,
    "h": 257.8
  },
  "luminance": 0.14905
}

Semantic roles & 50–950 ramp

primary

#306BBF

secondary

#CBAC80

accent

#A245E3

background

#F8F9FD

surface

#EFF1FA

border

#CACBD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #306BBF

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

Preview Lab → · Contrast checker → · Palette generator →