#1B587B#1B587B

#1B587B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 43.9% C 0.084 H 238.5°. Best body text is #FFFFFF at 7.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B587B
RGB	rgb(27, 88, 123)
HSL	hsl(202, 64%, 29%)
HSV	hsv(202, 78%, 48%)
CMYK	cmyk(78%, 28.5%, 0%, 51.8%)
CIE-LAB	lab(35.28, -6.45, -25.28)
CIE-LCH	lch(35.28, 26.09, 255.69°)
OKLab	oklab(43.9% -0.0437 -0.0714)
OKLCH	oklch(43.9% 0.084 238.5)
XYZ	xyz(7.5155, 8.6416, 20.0070)
Luminance	0.0864 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B587B #7B3E1B

analogous

#1B7B6E #1B587B #1B287B

triadic

#1B587B #7B1B58 #587B1B

tetradic

#1B587B #6E1B7B #7B3E1B #287B1B

square

#1B587B #6E1B7B #7B3E1B #287B1B

split-complementary

#1B587B #7B1B28 #7B6E1B

monochromatic

#061219 #103449 #1B587B #267CAD #3C9DD4

Accessibility & contrast

On white

7.70

#1B587B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1B587B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B587B

7.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B587B	#FFFFFF	#000000	##FFFFFF
##1B587B	1.00	7.70	2.73	7.70
#FFFFFF	7.70	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#47587D

Deuteranopia (green-blind)

#3A4F7A

Tritanopia (blue-blind)

#006164

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b587b;
/* rgb */ color: rgb(27, 88, 123);
/* oklch */ color: oklch(43.9% 0.084 238.5);

Tailwind

colors: {
  custom: {
    50: '#6687a1',
    500: '#1b587b',
    950: '#000000',
  },
}

SCSS

$custom: #1b587b;
$custom-light: #6687a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b587b",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 123
  },
  "hsl": {
    "h": 201.875,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.439,
    "c": 0.08374,
    "h": 238.5
  },
  "luminance": 0.08643
}

Semantic roles & 50–950 ramp

primary

#1B587B

secondary

#AF6A43

accent

#7D41E7

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #1B587B

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

Preview Lab → · Contrast checker → · Palette generator →