#3357B3#3357B3

#3357B3 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.3% C 0.152 H 265.1°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#3357B3
RGB	rgb(51, 87, 179)
HSL	hsl(223, 56%, 45%)
HSV	hsv(223, 72%, 70%)
CMYK	cmyk(71.5%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(39.20, 19.09, -52.74)
CIE-LCH	lch(39.20, 56.09, 289.89°)
OKLab	oklab(48.26% -0.0131 -0.1516)
OKLCH	oklch(48.26% 0.152 265.1)
XYZ	xyz(12.9073, 10.7735, 44.0384)
Luminance	0.1077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3357B3 #B38F33

analogous

#3397B3 #3357B3 #4F33B3

triadic

#3357B3 #B33357 #57B333

tetradic

#3357B3 #B33397 #B38F33 #33B34F

square

#3357B3 #B33397 #B38F33 #33B34F

split-complementary

#3357B3 #B34F33 #97B333

monochromatic

#182954 #254083 #3357B3 #5577CE #849DDC

Accessibility & contrast

On white

6.66

#3357B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#3357B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3357B3

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3357B3	#FFFFFF	#000000	##FFFFFF
##3357B3	1.00	6.66	3.16	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E63B6

Deuteranopia (green-blind)

#0057B1

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3357b3;
/* rgb */ color: rgb(51, 87, 179);
/* oklch */ color: oklch(48.3% 0.152 265.1);

Tailwind

colors: {
  custom: {
    50: '#7b85ca',
    500: '#3357b3',
    950: '#000000',
  },
}

SCSS

$custom: #3357b3;
$custom-light: #7b85ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3357b3",
  "rgb": {
    "r": 51,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 223.125,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.4826,
    "c": 0.15212,
    "h": 265.1
  },
  "luminance": 0.10775
}

Semantic roles & 50–950 ramp

primary

#3357B3

secondary

#C6B17C

accent

#B549DF

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3357B3

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

Preview Lab → · Contrast checker → · Palette generator →