#1B177E#1B177E

#1B177E is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.163 H 272.6°. Best body text is #FFFFFF at 14.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B177E
RGB	rgb(27, 23, 126)
HSL	hsl(242, 69%, 29%)
HSV	hsv(242, 82%, 49%)
CMYK	cmyk(78.6%, 81.7%, 0%, 50.6%)
CIE-LAB	lab(17.23, 37.94, -56.29)
CIE-LCH	lch(17.23, 67.89, 303.98°)
OKLab	oklab(30.3% 0.0073 -0.1629)
OKLCH	oklch(30.3% 0.163 272.6)
XYZ	xyz(4.5230, 2.3517, 19.9502)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B177E #7A7E17

analogous

#17477E #1B177E #4F177E

triadic

#1B177E #7E1B17 #177E1B

tetradic

#1B177E #7E1747 #7A7E17 #177E4F

square

#1B177E #7E1747 #7A7E17 #177E4F

split-complementary

#1B177E #7E4F17 #477E17

monochromatic

#06051A #100E4A #1B177E #2620B2 #3C35DA

Accessibility & contrast

On white

14.28

#1B177E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B177E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B177E

14.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B177E	#FFFFFF	#000000	##FFFFFF
##1B177E	1.00	14.28	1.47	14.28
#FFFFFF	14.28	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F81

Deuteranopia (green-blind)

#00257C

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b177e;
/* rgb */ color: rgb(27, 23, 126);
/* oklch */ color: oklch(30.3% 0.163 272.6);

Tailwind

colors: {
  custom: {
    50: '#6b57a5',
    500: '#1b177e',
    950: '#000000',
  },
}

SCSS

$custom: #1b177e;
$custom-light: #6b57a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b177e",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 126
  },
  "hsl": {
    "h": 242.33,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.30302,
    "c": 0.16307,
    "h": 272.6
  },
  "luminance": 0.02352
}

Semantic roles & 50–950 ramp

primary

#1B177E

secondary

#AEB33E

accent

#EC3CE5

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1B177E

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

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