#305BB3#305BB3

#305BB3 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.0% C 0.148 H 262.6°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#305BB3
RGB	rgb(48, 91, 179)
HSL	hsl(220, 58%, 45%)
HSV	hsv(220, 73%, 70%)
CMYK	cmyk(73.2%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(40.19, 16.05, -51.15)
CIE-LCH	lch(40.19, 53.61, 287.42°)
OKLab	oklab(48.98% -0.019 -0.1469)
OKLCH	oklch(48.98% 0.148 262.6)
XYZ	xyz(13.0938, 11.3638, 44.1424)
Luminance	0.1137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BB3 #B38830

analogous

#309DB3 #305BB3 #4630B3

triadic

#305BB3 #B3305B #5BB330

tetradic

#305BB3 #B3309D #B38830 #30B346

square

#305BB3 #B3309D #B38830 #30B346

split-complementary

#305BB3 #B34630 #9DB330

monochromatic

#162A52 #234283 #305BB3 #507AD0 #809FDD

Accessibility & contrast

On white

6.42

#305BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#305BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BB3

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BB3	#FFFFFF	#000000	##FFFFFF
##305BB3	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2965B6

Deuteranopia (green-blind)

#0059B1

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #305bb3;
/* rgb */ color: rgb(48, 91, 179);
/* oklch */ color: oklch(49.0% 0.148 262.6);

Tailwind

colors: {
  custom: {
    50: '#7a88ca',
    500: '#305bb3',
    950: '#000000',
  },
}

SCSS

$custom: #305bb3;
$custom-light: #7a88ca;
$custom-dark: #000000;

JSON

{
  "hex": "#305bb3",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 220.305,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4898,
    "c": 0.14809,
    "h": 262.6
  },
  "luminance": 0.11365
}

Semantic roles & 50–950 ramp

primary

#305BB3

secondary

#C6AD79

accent

#AE47E1

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #305BB3

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

Preview Lab → · Contrast checker → · Palette generator →