#305CB0#305CB0

#305CB0 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.0% C 0.143 H 261.8°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#305CB0
RGB	rgb(48, 92, 176)
HSL	hsl(219, 57%, 44%)
HSV	hsv(219, 73%, 69%)
CMYK	cmyk(72.7%, 47.7%, 0%, 31%)
CIE-LAB	lab(40.27, 14.27, -49.25)
CIE-LCH	lch(40.27, 51.27, 286.15°)
OKLab	oklab(48.98% -0.0203 -0.1412)
OKLCH	oklch(48.98% 0.143 261.8)
XYZ	xyz(12.8797, 11.4159, 42.5906)
Luminance	0.1142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305CB0 #B08430

analogous

#309CB0 #305CB0 #4430B0

triadic

#305CB0 #B0305C #5CB030

tetradic

#305CB0 #B0309C #B08430 #30B044

square

#305CB0 #B0309C #B08430 #30B044

split-complementary

#305CB0 #B04430 #9CB030

monochromatic

#162A50 #234380 #305CB0 #4E7BCF #7E9FDC

Accessibility & contrast

On white

6.40

#305CB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#305CB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305CB0

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305CB0	#FFFFFF	#000000	##FFFFFF
##305CB0	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F65B3

Deuteranopia (green-blind)

#0D59AE

Tritanopia (blue-blind)

#00707D

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #305cb0;
/* rgb */ color: rgb(48, 92, 176);
/* oklch */ color: oklch(49.0% 0.143 261.8);

Tailwind

colors: {
  custom: {
    50: '#7989c8',
    500: '#305cb0',
    950: '#000000',
  },
}

SCSS

$custom: #305cb0;
$custom-light: #7989c8;
$custom-dark: #000000;

JSON

{
  "hex": "#305cb0",
  "rgb": {
    "r": 48,
    "g": 92,
    "b": 176
  },
  "hsl": {
    "h": 219.375,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.48982,
    "c": 0.1427,
    "h": 261.8
  },
  "luminance": 0.11417
}

Semantic roles & 50–950 ramp

primary

#305CB0

secondary

#C5AA77

accent

#AC47E0

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #305CB0

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

Preview Lab → · Contrast checker → · Palette generator →