#17377B#17377B

#17377B is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.122 H 262.8°. Best body text is #FFFFFF at 11.24:1 contrast (WCAG AA passes).

Color values

HEX	#17377B
RGB	rgb(23, 55, 123)
HSL	hsl(221, 68%, 29%)
HSV	hsv(221, 81%, 48%)
CMYK	cmyk(81.3%, 55.3%, 0%, 51.8%)
CIE-LAB	lab(24.78, 15.18, -42.03)
CIE-LCH	lch(24.78, 44.69, 289.85°)
OKLab	oklab(35.68% -0.0152 -0.1211)
OKLCH	oklch(35.68% 0.122 262.8)
XYZ	xyz(5.2934, 4.3440, 19.2945)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17377B #7B5B17

analogous

#17697B #17377B #29177B

triadic

#17377B #7B1737 #377B17

tetradic

#17377B #7B1769 #7B5B17 #177B29

square

#17377B #7B1769 #7B5B17 #177B29

split-complementary

#17377B #7B2917 #697B17

monochromatic

#050C1A #0D2047 #17377B #214EAF #3368D9

Accessibility & contrast

On white

11.24

#17377B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#17377B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17377B

11.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17377B	#FFFFFF	#000000	##FFFFFF
##17377B	1.00	11.24	1.87	11.24
#FFFFFF	11.24	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03407D

Deuteranopia (green-blind)

#00367A

Tritanopia (blue-blind)

#004853

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #17377b;
/* rgb */ color: rgb(23, 55, 123);
/* oklch */ color: oklch(35.7% 0.122 262.8);

Tailwind

colors: {
  custom: {
    50: '#656da2',
    500: '#17377b',
    950: '#000000',
  },
}

SCSS

$custom: #17377b;
$custom-light: #656da2;
$custom-dark: #000000;

JSON

{
  "hex": "#17377b",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 123
  },
  "hsl": {
    "h": 220.8,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.35682,
    "c": 0.1221,
    "h": 262.8
  },
  "luminance": 0.04345
}

Semantic roles & 50–950 ramp

primary

#17377B

secondary

#B08B3E

accent

#B33CEB

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17377B

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

Preview Lab → · Contrast checker → · Palette generator →