#305FB3#305FB3

#305FB3 is a mid, vivid blue. Relative luminance 0.121; OKLCH L 49.9% C 0.143 H 261.0°. Best body text is #FFFFFF at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#305FB3
RGB	rgb(48, 95, 179)
HSL	hsl(218, 58%, 45%)
HSV	hsv(218, 73%, 70%)
CMYK	cmyk(73.2%, 46.9%, 0%, 29.8%)
CIE-LAB	lab(41.32, 13.45, -49.32)
CIE-LCH	lch(41.32, 51.13, 285.25°)
OKLab	oklab(49.85% -0.0225 -0.1414)
OKLCH	oklch(49.85% 0.143 261)
XYZ	xyz(13.4449, 12.0660, 44.2595)
Luminance	0.1207 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#305FB3 #B38430

analogous

#30A1B3 #305FB3 #4230B3

triadic

#305FB3 #B3305F #5FB330

tetradic

#305FB3 #B330A1 #B38430 #30B342

square

#305FB3 #B330A1 #B38430 #30B342

split-complementary

#305FB3 #B34230 #A1B330

monochromatic

#162C52 #234583 #305FB3 #507ED0 #80A2DD

Accessibility & contrast

On white

6.15

#305FB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#305FB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #305FB3

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##305FB3	#FFFFFF	#000000	##FFFFFF
##305FB3	1.00	6.15	3.41	6.15
#FFFFFF	6.15	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3368B6

Deuteranopia (green-blind)

#135CB1

Tritanopia (blue-blind)

#007380

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #305fb3;
/* rgb */ color: rgb(48, 95, 179);
/* oklch */ color: oklch(49.9% 0.143 261.0);

Tailwind

colors: {
  custom: {
    50: '#798bca',
    500: '#305fb3',
    950: '#000000',
  },
}

SCSS

$custom: #305fb3;
$custom-light: #798bca;
$custom-dark: #000000;

JSON

{
  "hex": "#305fb3",
  "rgb": {
    "r": 48,
    "g": 95,
    "b": 179
  },
  "hsl": {
    "h": 218.473,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4985,
    "c": 0.1432,
    "h": 261
  },
  "luminance": 0.12067
}

Semantic roles & 50–950 ramp

primary

#305FB3

secondary

#C6AA79

accent

#AA47E1

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #305FB3

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

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