#305BB5#305BB5

#305BB5 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.1% C 0.151 H 262.9°. Best body text is #FFFFFF at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#305BB5
RGB	rgb(48, 91, 181)
HSL	hsl(221, 58%, 45%)
HSV	hsv(221, 73%, 71%)
CMYK	cmyk(73.5%, 49.7%, 0%, 29%)
CIE-LAB	lab(40.32, 16.80, -52.11)
CIE-LCH	lch(40.32, 54.75, 287.87°)
OKLab	oklab(49.13% -0.0187 -0.1497)
OKLCH	oklch(49.13% 0.151 262.9)
XYZ	xyz(13.2975, 11.4453, 45.2155)
Luminance	0.1145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305BB5 #B58A30

analogous

#309DB5 #305BB5 #4830B5

triadic

#305BB5 #B5305B #5BB530

tetradic

#305BB5 #B5309D #B58A30 #30B548

square

#305BB5 #B5309D #B58A30 #30B548

split-complementary

#305BB5 #B54830 #9DB530

monochromatic

#162A54 #234385 #305BB5 #517BD1 #829FDE

Accessibility & contrast

On white

6.38

#305BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#305BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305BB5

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305BB5	#FFFFFF	#000000	##FFFFFF
##305BB5	1.00	6.38	3.29	6.38
#FFFFFF	6.38	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2765B8

Deuteranopia (green-blind)

#0059B3

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #305bb5;
/* rgb */ color: rgb(48, 91, 181);
/* oklch */ color: oklch(49.1% 0.151 262.9);

Tailwind

colors: {
  custom: {
    50: '#7a88cc',
    500: '#305bb5',
    950: '#000000',
  },
}

SCSS

$custom: #305bb5;
$custom-light: #7a88cc;
$custom-dark: #000000;

JSON

{
  "hex": "#305bb5",
  "rgb": {
    "r": 48,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 220.602,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.49125,
    "c": 0.15085,
    "h": 262.9
  },
  "luminance": 0.11447
}

Semantic roles & 50–950 ramp

primary

#305BB5

secondary

#C7AE7A

accent

#AF46E1

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #305BB5

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

Preview Lab → · Contrast checker → · Palette generator →