#305BB1#305BB1

#305BB1 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 48.8% C 0.145 H 262.4°. Best body text is #FFFFFF at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#305BB1
RGB	rgb(48, 91, 177)
HSL	hsl(220, 57%, 44%)
HSV	hsv(220, 73%, 69%)
CMYK	cmyk(72.9%, 48.6%, 0%, 30.6%)
CIE-LAB	lab(40.05, 15.29, -50.19)
CIE-LCH	lch(40.05, 52.47, 286.95°)
OKLab	oklab(48.84% -0.0192 -0.144)
OKLCH	oklch(48.84% 0.145 262.4)
XYZ	xyz(12.8930, 11.2835, 43.0849)
Luminance	0.1129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BB1 #B18630

analogous

#309CB1 #305BB1 #4630B1

triadic

#305BB1 #B1305B #5BB130

tetradic

#305BB1 #B1309C #B18630 #30B146

square

#305BB1 #B1309C #B18630 #30B146

split-complementary

#305BB1 #B14630 #9CB130

monochromatic

#162951 #234281 #305BB1 #4F7ACF #7F9EDC

Accessibility & contrast

On white

6.45

#305BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#305BB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BB1

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BB1	#FFFFFF	#000000	##FFFFFF
##305BB1	1.00	6.45	3.26	6.45
#FFFFFF	6.45	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B65B4

Deuteranopia (green-blind)

#0259AF

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #305bb1;
/* rgb */ color: rgb(48, 91, 177);
/* oklch */ color: oklch(48.8% 0.145 262.4);

Tailwind

colors: {
  custom: {
    50: '#7988c9',
    500: '#305bb1',
    950: '#000000',
  },
}

SCSS

$custom: #305bb1;
$custom-light: #7988c9;
$custom-dark: #000000;

JSON

{
  "hex": "#305bb1",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 177
  },
  "hsl": {
    "h": 220,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.48836,
    "c": 0.14531,
    "h": 262.4
  },
  "luminance": 0.11285
}

Semantic roles & 50–950 ramp

primary

#305BB1

secondary

#C5AB78

accent

#AD47E1

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #305BB1

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

Preview Lab → · Contrast checker → · Palette generator →