#17337B#17337B

#17337B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.8% C 0.127 H 264.5°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#17337B
RGB	rgb(23, 51, 123)
HSL	hsl(223, 68%, 29%)
HSV	hsv(223, 81%, 48%)
CMYK	cmyk(81.3%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(23.60, 18.02, -43.94)
CIE-LCH	lch(23.60, 47.49, 292.30°)
OKLab	oklab(34.79% -0.0122 -0.1268)
OKLCH	oklch(34.79% 0.127 264.5)
XYZ	xyz(5.1111, 3.9793, 19.2338)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17337B #7B5F17

analogous

#17657B #17337B #2D177B

triadic

#17337B #7B1733 #337B17

tetradic

#17337B #7B1765 #7B5F17 #177B2D

square

#17337B #7B1765 #7B5F17 #177B2D

split-complementary

#17337B #7B2D17 #657B17

monochromatic

#050B1A #0D1E47 #17337B #2148AF #3362D9

Accessibility & contrast

On white

11.69

#17337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#17337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17337B

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17337B	#FFFFFF	#000000	##FFFFFF
##17337B	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00347A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #17337b;
/* rgb */ color: rgb(23, 51, 123);
/* oklch */ color: oklch(34.8% 0.127 264.5);

Tailwind

colors: {
  custom: {
    50: '#666aa2',
    500: '#17337b',
    950: '#000000',
  },
}

SCSS

$custom: #17337b;
$custom-light: #666aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#17337b",
  "rgb": {
    "r": 23,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 223.2,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.34794,
    "c": 0.1274,
    "h": 264.5
  },
  "luminance": 0.0398
}

Semantic roles & 50–950 ramp

primary

#17337B

secondary

#B0903E

accent

#BA3CEB

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #17337B

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

Preview Lab → · Contrast checker → · Palette generator →