#1B5380#1B5380

#1B5380 is a dark, moderate cyan. Relative luminance 0.080; OKLCH L 42.9% C 0.094 H 246.9°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B5380
RGB	rgb(27, 83, 128)
HSL	hsl(207, 65%, 30%)
HSV	hsv(207, 79%, 50%)
CMYK	cmyk(78.9%, 35.2%, 0%, 49.8%)
CIE-LAB	lab(33.94, -1.35, -30.49)
CIE-LCH	lch(33.94, 30.52, 267.46°)
OKLab	oklab(42.92% -0.037 -0.0866)
OKLCH	oklch(42.92% 0.094 246.9)
XYZ	xyz(7.4400, 7.9772, 21.5655)
Luminance	0.0798 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5380 #80481B

analogous

#1B807A #1B5380 #1B2080

triadic

#1B5380 #801B53 #53801B

tetradic

#1B5380 #7A1B80 #80481B #20801B

square

#1B5380 #7A1B80 #80481B #20801B

split-complementary

#1B5380 #801B20 #807A1B

monochromatic

#06111B #10324D #1B5380 #2674B3 #3F93D6

Accessibility & contrast

On white

8.09

#1B5380 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#1B5380 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5380

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5380	#FFFFFF	#000000	##FFFFFF
##1B5380	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5582

Deuteranopia (green-blind)

#304C7F

Tritanopia (blue-blind)

#005E63

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b5380;
/* rgb */ color: rgb(27, 83, 128);
/* oklch */ color: oklch(42.9% 0.094 246.9);

Tailwind

colors: {
  custom: {
    50: '#6783a5',
    500: '#1b5380',
    950: '#000000',
  },
}

SCSS

$custom: #1b5380;
$custom-light: #6783a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5380",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 128
  },
  "hsl": {
    "h": 206.733,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.42918,
    "c": 0.0942,
    "h": 246.9
  },
  "luminance": 0.07978
}

Semantic roles & 50–950 ramp

primary

#1B5380

secondary

#B47543

accent

#8B40E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B5380

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

Preview Lab → · Contrast checker → · Palette generator →