#17377E#17377E

#17377E is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.126 H 263.2°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#17377E
RGB	rgb(23, 55, 126)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 82%, 49%)
CMYK	cmyk(81.7%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(25.01, 16.42, -43.54)
CIE-LCH	lch(25.01, 46.53, 290.66°)
OKLab	oklab(35.94% -0.0149 -0.1256)
OKLCH	oklch(35.94% 0.126 263.2)
XYZ	xyz(5.4841, 4.4203, 20.2988)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17377E #7E5E17

analogous

#176B7E #17377E #2A177E

triadic

#17377E #7E1737 #377E17

tetradic

#17377E #7E176B #7E5E17 #177E2A

square

#17377E #7E176B #7E5E17 #177E2A

split-complementary

#17377E #7E2A17 #6B7E17

monochromatic

#050B1A #0E204A #17377E #204EB2 #3568DA

Accessibility & contrast

On white

11.15

#17377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#17377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17377E

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17377E	#FFFFFF	#000000	##FFFFFF
##17377E	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004080

Deuteranopia (green-blind)

#00377D

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #17377e;
/* rgb */ color: rgb(23, 55, 126);
/* oklch */ color: oklch(35.9% 0.126 263.2);

Tailwind

colors: {
  custom: {
    50: '#666da4',
    500: '#17377e',
    950: '#000000',
  },
}

SCSS

$custom: #17377e;
$custom-light: #666da4;
$custom-dark: #000000;

JSON

{
  "hex": "#17377e",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 221.359,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35937,
    "c": 0.12646,
    "h": 263.2
  },
  "luminance": 0.04421
}

Semantic roles & 50–950 ramp

primary

#17377E

secondary

#B38E3E

accent

#B53CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17377E

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

Preview Lab → · Contrast checker → · Palette generator →