#355FBB#355FBB

#355FBB is a mid, vivid blue. Relative luminance 0.125; OKLCH L 50.6% C 0.153 H 263.5°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#355FBB
RGB	rgb(53, 95, 187)
HSL	hsl(221, 56%, 47%)
HSV	hsv(221, 72%, 73%)
CMYK	cmyk(71.7%, 49.2%, 0%, 26.7%)
CIE-LAB	lab(42.04, 17.15, -52.83)
CIE-LCH	lch(42.04, 55.54, 287.98°)
OKLab	oklab(50.63% -0.0174 -0.1517)
OKLCH	oklch(50.63% 0.153 263.5)
XYZ	xyz(14.5269, 12.5276, 48.6566)
Luminance	0.1253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#355FBB #BB9135

analogous

#35A2BB #355FBB #4E35BB

triadic

#355FBB #BB355F #5FBB35

tetradic

#355FBB #BB35A2 #BB9135 #35BB4E

square

#355FBB #BB35A2 #BB9135 #35BB4E

split-complementary

#355FBB #BB4E35 #A2BB35

monochromatic

#1A2F5C #27478B #355FBB #5C81D1 #8CA6DE

Accessibility & contrast

On white

5.99

#355FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#355FBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #355FBB

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##355FBB	#FFFFFF	#000000	##FFFFFF
##355FBB	1.00	5.99	3.51	5.99
#FFFFFF	5.99	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B6ABE

Deuteranopia (green-blind)

#005DB9

Tritanopia (blue-blind)

#007584

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #355fbb;
/* rgb */ color: rgb(53, 95, 187);
/* oklch */ color: oklch(50.6% 0.153 263.5);

Tailwind

colors: {
  custom: {
    50: '#7d8bd0',
    500: '#355fbb',
    950: '#000000',
  },
}

SCSS

$custom: #355fbb;
$custom-light: #7d8bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#355fbb",
  "rgb": {
    "r": 53,
    "g": 95,
    "b": 187
  },
  "hsl": {
    "h": 221.194,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.50626,
    "c": 0.15265,
    "h": 263.5
  },
  "luminance": 0.12529
}

Semantic roles & 50–950 ramp

primary

#355FBB

secondary

#C9B383

accent

#B049DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #355FBB

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

Preview Lab → · Contrast checker → · Palette generator →