#305AB7#305AB7

#305AB7 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.1% C 0.155 H 263.5°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#305AB7
RGB	rgb(48, 90, 183)
HSL	hsl(221, 58%, 45%)
HSV	hsv(221, 74%, 72%)
CMYK	cmyk(73.8%, 50.8%, 0%, 28.2%)
CIE-LAB	lab(40.18, 18.21, -53.51)
CIE-LCH	lch(40.18, 56.53, 288.80°)
OKLab	oklab(49.06% -0.0176 -0.1538)
OKLCH	oklch(49.06% 0.155 263.5)
XYZ	xyz(13.4193, 11.3581, 46.2757)
Luminance	0.1136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305AB7 #B78D30

analogous

#309EB7 #305AB7 #4930B7

triadic

#305AB7 #B7305A #5AB730

tetradic

#305AB7 #B7309E #B78D30 #30B749

square

#305AB7 #B7309E #B78D30 #30B749

split-complementary

#305AB7 #B74930 #9EB730

monochromatic

#172A56 #234287 #305AB7 #527AD2 #839FDE

Accessibility & contrast

On white

6.42

#305AB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#305AB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305AB7

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305AB7	#FFFFFF	#000000	##FFFFFF
##305AB7	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)

#2165BA

Deuteranopia (green-blind)

#0059B5

Tritanopia (blue-blind)

#007080

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #305ab7;
/* rgb */ color: rgb(48, 90, 183);
/* oklch */ color: oklch(49.1% 0.155 263.5);

Tailwind

colors: {
  custom: {
    50: '#7b88cd',
    500: '#305ab7',
    950: '#000000',
  },
}

SCSS

$custom: #305ab7;
$custom-light: #7b88cd;
$custom-dark: #000000;

JSON

{
  "hex": "#305ab7",
  "rgb": {
    "r": 48,
    "g": 90,
    "b": 183
  },
  "hsl": {
    "h": 221.333,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.4906,
    "c": 0.15484,
    "h": 263.5
  },
  "luminance": 0.1136
}

Semantic roles & 50–950 ramp

primary

#305AB7

secondary

#C8B07B

accent

#B146E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #305AB7

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

Preview Lab → · Contrast checker → · Palette generator →