#1B587E#1B587E

#1B587E is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.1% C 0.087 H 240.7°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B587E
RGB	rgb(27, 88, 126)
HSL	hsl(203, 65%, 30%)
HSV	hsv(203, 79%, 49%)
CMYK	cmyk(78.6%, 30.2%, 0%, 50.6%)
CIE-LAB	lab(35.44, -5.30, -26.89)
CIE-LCH	lch(35.44, 27.41, 258.85°)
OKLab	oklab(44.07% -0.0427 -0.0761)
OKLCH	oklch(44.07% 0.087 240.7)
XYZ	xyz(7.7061, 8.7179, 21.0112)
Luminance	0.0872 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B587E #7E411B

analogous

#1B7E72 #1B587E #1B277E

triadic

#1B587E #7E1B58 #587E1B

tetradic

#1B587E #721B7E #7E411B #277E1B

square

#1B587E #721B7E #7E411B #277E1B

split-complementary

#1B587E #7E1B27 #7E721B

monochromatic

#051219 #10354C #1B587E #267BB0 #3E9BD6

Accessibility & contrast

On white

7.65

#1B587E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B587E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B587E

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B587E	#FFFFFF	#000000	##FFFFFF
##1B587E	1.00	7.65	2.74	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#465880

Deuteranopia (green-blind)

#394F7D

Tritanopia (blue-blind)

#006165

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b587e;
/* rgb */ color: rgb(27, 88, 126);
/* oklch */ color: oklch(44.1% 0.087 240.7);

Tailwind

colors: {
  custom: {
    50: '#6787a3',
    500: '#1b587e',
    950: '#000000',
  },
}

SCSS

$custom: #1b587e;
$custom-light: #6787a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b587e",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 126
  },
  "hsl": {
    "h": 203.03,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.44069,
    "c": 0.08724,
    "h": 240.7
  },
  "luminance": 0.08719
}

Semantic roles & 50–950 ramp

primary

#1B587E

secondary

#B26E43

accent

#8040E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B587E

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

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