#1B5188#1B5188

#1B5188 is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.9% C 0.107 H 252.1°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B5188
RGB	rgb(27, 81, 136)
HSL	hsl(210, 67%, 32%)
HSV	hsv(210, 80%, 53%)
CMYK	cmyk(80.1%, 40.4%, 0%, 46.7%)
CIE-LAB	lab(33.76, 3.13, -35.68)
CIE-LCH	lch(33.76, 35.82, 275.01°)
OKLab	oklab(42.93% -0.0328 -0.1019)
OKLCH	oklch(42.93% 0.107 252.1)
XYZ	xyz(7.8367, 7.8945, 24.3985)
Luminance	0.0790 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5188 #88521B

analogous

#1B8888 #1B5188 #1B1B88

triadic

#1B5188 #881B51 #51881B

tetradic

#1B5188 #881B88 #88521B #1B881B

square

#1B5188 #881B88 #88521B #1B881B

split-complementary

#1B5188 #881B1B #88881B

monochromatic

#071422 #113355 #1B5188 #256FBB #448EDA

Accessibility & contrast

On white

8.14

#1B5188 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#1B5188 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5188

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5188	#FFFFFF	#000000	##FFFFFF
##1B5188	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37558A

Deuteranopia (green-blind)

#254B87

Tritanopia (blue-blind)

#005E66

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b5188;
/* rgb */ color: rgb(27, 81, 136);
/* oklch */ color: oklch(42.9% 0.107 252.1);

Tailwind

colors: {
  custom: {
    50: '#6981ab',
    500: '#1b5188',
    950: '#000000',
  },
}

SCSS

$custom: #1b5188;
$custom-light: #6981ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5188",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 136
  },
  "hsl": {
    "h": 210.275,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.42932,
    "c": 0.10704,
    "h": 252.1
  },
  "luminance": 0.07895
}

Semantic roles & 50–950 ramp

primary

#1B5188

secondary

#BB8044

accent

#953EEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B5188

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

Preview Lab → · Contrast checker → · Palette generator →