#305BBB#305BBB

#305BBB is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.6% C 0.159 H 263.5°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#305BBB
RGB	rgb(48, 91, 187)
HSL	hsl(221, 59%, 46%)
HSV	hsv(221, 74%, 73%)
CMYK	cmyk(74.3%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(40.73, 19.07, -54.96)
CIE-LCH	lch(40.73, 58.17, 289.13°)
OKLab	oklab(49.57% -0.0179 -0.1581)
OKLCH	oklch(49.57% 0.159 263.5)
XYZ	xyz(13.9265, 11.6969, 48.5278)
Luminance	0.1170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BBB #BB9030

analogous

#30A0BB #305BBB #4A30BB

triadic

#305BBB #BB305B #5BBB30

tetradic

#305BBB #BB30A0 #BB9030 #30BB4A

square

#305BBB #BB30A0 #BB9030 #30BB4A

split-complementary

#305BBB #BB4A30 #A0BB30

monochromatic

#172C5A #23438A #305BBB #557CD3 #86A1E0

Accessibility & contrast

On white

6.29

#305BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#305BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BBB

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BBB	#FFFFFF	#000000	##FFFFFF
##305BBB	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E67BE

Deuteranopia (green-blind)

#005AB9

Tritanopia (blue-blind)

#007282

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #305bbb;
/* rgb */ color: rgb(48, 91, 187);
/* oklch */ color: oklch(49.6% 0.159 263.5);

Tailwind

colors: {
  custom: {
    50: '#7b88d0',
    500: '#305bbb',
    950: '#000000',
  },
}

SCSS

$custom: #305bbb;
$custom-light: #7b88d0;
$custom-dark: #000000;

JSON

{
  "hex": "#305bbb",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 221.439,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.49569,
    "c": 0.1591,
    "h": 263.5
  },
  "luminance": 0.11698
}

Semantic roles & 50–950 ramp

primary

#305BBB

secondary

#C9B27D

accent

#B245E2

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #305BBB

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

Preview Lab → · Contrast checker → · Palette generator →