#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
RGBrgb(23, 56, 123)
HSLhsl(220, 68%, 29%)
HSVhsv(220, 81%, 48%)
CMYKcmyk(81.3%, 54.5%, 0%, 51.8%)
CIE-LABlab(25.08, 14.47, -41.55)
CIE-LCHlch(25.08, 43.99, 289.20°)
OKLaboklab(35.91% -0.016 -0.1197)
OKLCHoklch(35.91% 0.121 262.4)
XYZxyz(5.3414, 4.4399, 19.3105)
Luminance0.0444 (WCAG relative)
Temperaturecool
Familyblue

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
##17387B1.0011.121.8911.12
#FFFFFF11.121.0021.001.00
#0000001.8921.001.0021.00
##FFFFFF11.121.0021.001.00

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 →

#17387B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva