#305CBB#305CBB

#305CBB is a mid, vivid blue. Relative luminance 0.119; OKLCH L 49.8% C 0.158 H 263.2°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#305CBB
RGB	rgb(48, 92, 187)
HSL	hsl(221, 59%, 46%)
HSV	hsv(221, 74%, 73%)
CMYK	cmyk(74.3%, 50.8%, 0%, 26.7%)
CIE-LAB	lab(41.01, 18.42, -54.51)
CIE-LCH	lch(41.01, 57.54, 288.67°)
OKLab	oklab(49.78% -0.0188 -0.1567)
OKLCH	oklch(49.78% 0.158 263.2)
XYZ	xyz(14.0125, 11.8690, 48.5565)
Luminance	0.1187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305CBB #BB8F30

analogous

#30A1BB #305CBB #4930BB

triadic

#305CBB #BB305C #5CBB30

tetradic

#305CBB #BB30A1 #BB8F30 #30BB49

square

#305CBB #BB30A1 #BB8F30 #30BB49

split-complementary

#305CBB #BB4930 #A1BB30

monochromatic

#172C5A #23448A #305CBB #557DD3 #86A2E0

Accessibility & contrast

On white

6.22

#305CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#305CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305CBB

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305CBB	#FFFFFF	#000000	##FFFFFF
##305CBB	1.00	6.22	3.37	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2167BE

Deuteranopia (green-blind)

#005BB9

Tritanopia (blue-blind)

#007383

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #305cbb;
/* rgb */ color: rgb(48, 92, 187);
/* oklch */ color: oklch(49.8% 0.158 263.2);

Tailwind

colors: {
  custom: {
    50: '#7b89d0',
    500: '#305cbb',
    950: '#000000',
  },
}

SCSS

$custom: #305cbb;
$custom-light: #7b89d0;
$custom-dark: #000000;

JSON

{
  "hex": "#305cbb",
  "rgb": {
    "r": 48,
    "g": 92,
    "b": 187
  },
  "hsl": {
    "h": 221.007,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.49779,
    "c": 0.15787,
    "h": 263.2
  },
  "luminance": 0.11871
}

Semantic roles & 50–950 ramp

primary

#305CBB

secondary

#C9B17D

accent

#B145E2

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #305CBB

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

Preview Lab → · Contrast checker → · Palette generator →