#17387B#17387B

#17387B is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.121 H 262.4°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#17387B
RGB	rgb(23, 56, 123)
HSL	hsl(220, 68%, 29%)
HSV	hsv(220, 81%, 48%)
CMYK	cmyk(81.3%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(25.08, 14.47, -41.55)
CIE-LCH	lch(25.08, 43.99, 289.20°)
OKLab	oklab(35.91% -0.016 -0.1197)
OKLCH	oklch(35.91% 0.121 262.4)
XYZ	xyz(5.3414, 4.4399, 19.3105)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17387B #7B5A17

analogous

#176A7B #17387B #28177B

triadic

#17387B #7B1738 #387B17

tetradic

#17387B #7B176A #7B5A17 #177B28

square

#17387B #7B176A #7B5A17 #177B28

split-complementary

#17387B #7B2817 #6A7B17

monochromatic

#050C1A #0D2147 #17387B #214FAF #336AD9

Accessibility & contrast

On white

11.12

#17387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#17387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17387B

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17387B	#FFFFFF	#000000	##FFFFFF
##17387B	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08407D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #17387b;
/* rgb */ color: rgb(23, 56, 123);
/* oklch */ color: oklch(35.9% 0.121 262.4);

Tailwind

colors: {
  custom: {
    50: '#656ea2',
    500: '#17387b',
    950: '#000000',
  },
}

SCSS

$custom: #17387b;
$custom-light: #656ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#17387b",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 220.2,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.35908,
    "c": 0.12077,
    "h": 262.4
  },
  "luminance": 0.04441
}

Semantic roles & 50–950 ramp

primary

#17387B

secondary

#B08A3E

accent

#B23CEB

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17387B

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

Preview Lab → · Contrast checker → · Palette generator →