#303EBB#303EBB

#303EBB is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.194 H 270.8°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#303EBB
RGB	rgb(48, 62, 187)
HSL	hsl(234, 59%, 46%)
HSV	hsv(234, 74%, 73%)
CMYK	cmyk(74.3%, 66.8%, 0%, 26.7%)
CIE-LAB	lab(33.26, 37.84, -67.12)
CIE-LCH	lch(33.26, 77.05, 299.41°)
OKLab	oklab(44% 0.0026 -0.1941)
OKLCH	oklch(44% 0.194 270.8)
XYZ	xyz(11.9081, 7.6602, 47.8551)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EBB #BBAD30

analogous

#3083BB #303EBB #6730BB

triadic

#303EBB #BB303E #3EBB30

tetradic

#303EBB #BB3083 #BBAD30 #30BB67

square

#303EBB #BB3083 #BBAD30 #30BB67

split-complementary

#303EBB #BB6730 #83BB30

monochromatic

#171E5A #232E8A #303EBB #5562D3 #868FE0

Accessibility & contrast

On white

8.29

#303EBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#303EBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EBB

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EBB	#FFFFFF	#000000	##FFFFFF
##303EBB	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#0048B9

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #303ebb;
/* rgb */ color: rgb(48, 62, 187);
/* oklch */ color: oklch(44.0% 0.194 270.8);

Tailwind

colors: {
  custom: {
    50: '#7d73d1',
    500: '#303ebb',
    950: '#000000',
  },
}

SCSS

$custom: #303ebb;
$custom-light: #7d73d1;
$custom-dark: #000000;

JSON

{
  "hex": "#303ebb",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 187
  },
  "hsl": {
    "h": 233.957,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.44,
    "c": 0.19417,
    "h": 270.8
  },
  "luminance": 0.07661
}

Semantic roles & 50–950 ramp

primary

#303EBB

secondary

#C9C27D

accent

#D345E2

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #303EBB

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

Preview Lab → · Contrast checker → · Palette generator →