#1B2179#1B2179

#1B2179 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.2% C 0.146 H 271.4°. Best body text is #FFFFFF at 13.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B2179
RGB	rgb(27, 33, 121)
HSL	hsl(236, 64%, 29%)
HSV	hsv(236, 78%, 47%)
CMYK	cmyk(77.7%, 72.7%, 0%, 52.5%)
CIE-LAB	lab(18.80, 30.14, -50.51)
CIE-LCH	lch(18.80, 58.82, 300.82°)
OKLab	oklab(31.25% 0.0036 -0.1462)
OKLCH	oklch(31.25% 0.146 271.4)
XYZ	xyz(4.4459, 2.7007, 18.3724)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2179 #79731B

analogous

#1B5079 #1B2179 #441B79

triadic

#1B2179 #791B21 #21791B

tetradic

#1B2179 #791B50 #79731B #1B7944

square

#1B2179 #791B50 #79731B #1B7944

split-complementary

#1B2179 #79441B #50791B

monochromatic

#060719 #101347 #1B2179 #262FAB #3B45D3

Accessibility & contrast

On white

13.63

#1B2179 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B2179 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2179

13.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2179	#FFFFFF	#000000	##FFFFFF
##1B2179	1.00	13.63	1.54	13.63
#FFFFFF	13.63	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327C

Deuteranopia (green-blind)

#002977

Tritanopia (blue-blind)

#00394A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2179;
/* rgb */ color: rgb(27, 33, 121);
/* oklch */ color: oklch(31.2% 0.146 271.4);

Tailwind

colors: {
  custom: {
    50: '#685da1',
    500: '#1b2179',
    950: '#000000',
  },
}

SCSS

$custom: #1b2179;
$custom-light: #685da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2179",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 121
  },
  "hsl": {
    "h": 236.17,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31248,
    "c": 0.14622,
    "h": 271.4
  },
  "luminance": 0.02701
}

Semantic roles & 50–950 ramp

primary

#1B2179

secondary

#ADA643

accent

#DC41E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B2179

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

Preview Lab → · Contrast checker → · Palette generator →