#333F9B#333F9B

#333F9B is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.5% C 0.149 H 272.5°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#333F9B
RGB	rgb(51, 63, 155)
HSL	hsl(233, 50%, 40%)
HSV	hsv(233, 67%, 61%)
CMYK	cmyk(67.1%, 59.4%, 0%, 39.2%)
CIE-LAB	lab(30.94, 26.07, -51.78)
CIE-LCH	lch(30.94, 57.97, 296.72°)
OKLab	oklab(41.48% 0.0065 -0.1491)
OKLCH	oklch(41.48% 0.149 272.5)
XYZ	xyz(9.0572, 6.6246, 31.8054)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#333F9B #9B8F33

analogous

#33739B #333F9B #5B339B

triadic

#333F9B #9B333F #3F9B33

tetradic

#333F9B #9B3373 #9B8F33 #339B5B

square

#333F9B #9B3373 #9B8F33 #339B5B

split-complementary

#333F9B #9B5B33 #739B33

monochromatic

#151A3F #242C6D #333F9B #4856C3 #7681D2

Accessibility & contrast

On white

9.03

#333F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#333F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333F9B

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333F9B	#FFFFFF	#000000	##FFFFFF
##333F9B	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9E

Deuteranopia (green-blind)

#004499

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #333f9b;
/* rgb */ color: rgb(51, 63, 155);
/* oklch */ color: oklch(41.5% 0.149 272.5);

Tailwind

colors: {
  custom: {
    50: '#7774b9',
    500: '#333f9b',
    950: '#000000',
  },
}

SCSS

$custom: #333f9b;
$custom-light: #7774b9;
$custom-dark: #000000;

JSON

{
  "hex": "#333f9b",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 155
  },
  "hsl": {
    "h": 233.077,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.41484,
    "c": 0.14921,
    "h": 272.5
  },
  "luminance": 0.06625
}

Semantic roles & 50–950 ramp

primary

#333F9B

secondary

#BAB26F

accent

#CA4EDA

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #333F9B

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

Preview Lab → · Contrast checker → · Palette generator →