#1B2177#1B2177

#1B2177 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.0% C 0.143 H 271.5°. Best body text is #FFFFFF at 13.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B2177
RGB	rgb(27, 33, 119)
HSL	hsl(236, 63%, 29%)
HSV	hsv(236, 77%, 47%)
CMYK	cmyk(77.3%, 72.3%, 0%, 53.3%)
CIE-LAB	lab(18.59, 29.39, -49.58)
CIE-LCH	lch(18.59, 57.63, 300.66°)
OKLab	oklab(31.03% 0.0039 -0.1434)
OKLCH	oklch(31.03% 0.144 271.5)
XYZ	xyz(4.3245, 2.6522, 17.7332)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2177 #77711B

analogous

#1B4F77 #1B2177 #431B77

triadic

#1B2177 #771B21 #21771B

tetradic

#1B2177 #771B4F #77711B #1B7743

square

#1B2177 #771B4F #77711B #1B7743

split-complementary

#1B2177 #77431B #4F771B

monochromatic

#060719 #101345 #1B2177 #262FA9 #3A44D2

Accessibility & contrast

On white

13.72

#1B2177 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B2177 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2177

13.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2177	#FFFFFF	#000000	##FFFFFF
##1B2177	1.00	13.72	1.53	13.72
#FFFFFF	13.72	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327A

Deuteranopia (green-blind)

#002975

Tritanopia (blue-blind)

#003949

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b2177;
/* rgb */ color: rgb(27, 33, 119);
/* oklch */ color: oklch(31.0% 0.143 271.5);

Tailwind

colors: {
  custom: {
    50: '#685c9f',
    500: '#1b2177',
    950: '#000000',
  },
}

SCSS

$custom: #1b2177;
$custom-light: #685c9f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2177",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 119
  },
  "hsl": {
    "h": 236.087,
    "s": 63.014,
    "l": 28.627
  },
  "oklch": {
    "l": 0.31033,
    "c": 0.1435,
    "h": 271.5
  },
  "luminance": 0.02653
}

Semantic roles & 50–950 ramp

primary

#1B2177

secondary

#ABA542

accent

#DB42E6

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #1B2177

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

Preview Lab → · Contrast checker → · Palette generator →