#1B5A8B#1B5A8B

#1B5A8B is a mid, moderate cyan. Relative luminance 0.094; OKLCH L 45.3% C 0.102 H 246.5°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B5A8B
RGB	rgb(27, 90, 139)
HSL	hsl(206, 67%, 33%)
HSV	hsv(206, 81%, 55%)
CMYK	cmyk(80.6%, 35.3%, 0%, 45.5%)
CIE-LAB	lab(36.76, -1.50, -32.76)
CIE-LCH	lch(36.76, 32.79, 267.38°)
OKLab	oklab(45.34% -0.0405 -0.0932)
OKLCH	oklch(45.34% 0.102 246.5)
XYZ	xyz(8.7666, 9.4084, 25.7751)
Luminance	0.0941 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5A8B #8B4C1B

analogous

#1B8B84 #1B5A8B #1B228B

triadic

#1B5A8B #8B1B5A #5A8B1B

tetradic

#1B5A8B #841B8B #8B4C1B #228B1B

square

#1B5A8B #841B8B #8B4C1B #228B1B

split-complementary

#1B5A8B #8B1B22 #8B841B

monochromatic

#071825 #113958 #1B5A8B #257BBE #459ADB

Accessibility & contrast

On white

7.29

#1B5A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#1B5A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5A8B

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5A8B	#FFFFFF	#000000	##FFFFFF
##1B5A8B	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#435C8D

Deuteranopia (green-blind)

#33528A

Tritanopia (blue-blind)

#00666C

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b5a8b;
/* rgb */ color: rgb(27, 90, 139);
/* oklch */ color: oklch(45.3% 0.102 246.5);

Tailwind

colors: {
  custom: {
    50: '#6a88ad',
    500: '#1b5a8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b5a8b;
$custom-light: #6a88ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5a8b",
  "rgb": {
    "r": 27,
    "g": 90,
    "b": 139
  },
  "hsl": {
    "h": 206.25,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.45339,
    "c": 0.10158,
    "h": 246.5
  },
  "luminance": 0.09409
}

Semantic roles & 50–950 ramp

primary

#1B5A8B

secondary

#BC7945

accent

#893DEA

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1B5A8B

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

Preview Lab → · Contrast checker → · Palette generator →