#1B177F#1B177F

#1B177F is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.164 H 272.5°. Best body text is #FFFFFF at 14.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B177F
RGB	rgb(27, 23, 127)
HSL	hsl(242, 69%, 29%)
HSV	hsv(242, 82%, 50%)
CMYK	cmyk(78.7%, 81.9%, 0%, 50.2%)
CIE-LAB	lab(17.36, 38.28, -56.73)
CIE-LCH	lch(17.36, 68.44, 304.01°)
OKLab	oklab(30.42% 0.0071 -0.1642)
OKLCH	oklch(30.42% 0.164 272.5)
XYZ	xyz(4.5879, 2.3776, 20.2917)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B177F #7B7F17

analogous

#17477F #1B177F #4F177F

triadic

#1B177F #7F1B17 #177F1B

tetradic

#1B177F #7F1747 #7B7F17 #177F4F

square

#1B177F #7F1747 #7B7F17 #177F4F

split-complementary

#1B177F #7F4F17 #477F17

monochromatic

#06051A #100E4B #1B177F #2620B3 #3C36DB

Accessibility & contrast

On white

14.23

#1B177F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1B177F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B177F

14.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B177F	#FFFFFF	#000000	##FFFFFF
##1B177F	1.00	14.23	1.48	14.23
#FFFFFF	14.23	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003082

Deuteranopia (green-blind)

#00257D

Tritanopia (blue-blind)

#00374B

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1b177f;
/* rgb */ color: rgb(27, 23, 127);
/* oklch */ color: oklch(30.4% 0.164 272.5);

Tailwind

colors: {
  custom: {
    50: '#6b57a5',
    500: '#1b177f',
    950: '#000000',
  },
}

SCSS

$custom: #1b177f;
$custom-light: #6b57a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b177f",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 127
  },
  "hsl": {
    "h": 242.308,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30422,
    "c": 0.16432,
    "h": 272.5
  },
  "luminance": 0.02378
}

Semantic roles & 50–950 ramp

primary

#1B177F

secondary

#AFB43E

accent

#EC3CE5

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1B177F

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

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