#1B507B#1B507B

#1B507B is a dark, moderate cyan. Relative luminance 0.074; OKLCH L 41.9% C 0.091 H 246.9°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B507B
RGB	rgb(27, 80, 123)
HSL	hsl(207, 64%, 29%)
HSV	hsv(207, 78%, 48%)
CMYK	cmyk(78%, 35%, 0%, 51.8%)
CIE-LAB	lab(32.70, -1.39, -29.34)
CIE-LCH	lch(32.70, 29.38, 267.29°)
OKLab	oklab(41.86% -0.0355 -0.0833)
OKLCH	oklch(41.86% 0.091 246.9)
XYZ	xyz(6.8944, 7.3996, 19.8000)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B507B #7B461B

analogous

#1B7B76 #1B507B #1B207B

triadic

#1B507B #7B1B50 #507B1B

tetradic

#1B507B #761B7B #7B461B #207B1B

square

#1B507B #761B7B #7B461B #207B1B

split-complementary

#1B507B #7B1B20 #7B761B

monochromatic

#061019 #102F49 #1B507B #2671AD #3C90D4

Accessibility & contrast

On white

8.47

#1B507B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#1B507B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B507B

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B507B	#FFFFFF	#000000	##FFFFFF
##1B507B	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C527D

Deuteranopia (green-blind)

#2F497A

Tritanopia (blue-blind)

#005A60

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b507b;
/* rgb */ color: rgb(27, 80, 123);
/* oklch */ color: oklch(41.9% 0.091 246.9);

Tailwind

colors: {
  custom: {
    50: '#6680a1',
    500: '#1b507b',
    950: '#000000',
  },
}

SCSS

$custom: #1b507b;
$custom-light: #6680a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b507b",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 123
  },
  "hsl": {
    "h": 206.875,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.41856,
    "c": 0.0906,
    "h": 246.9
  },
  "luminance": 0.074
}

Semantic roles & 50–950 ramp

primary

#1B507B

secondary

#AF7343

accent

#8B41E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1B507B

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

Preview Lab → · Contrast checker → · Palette generator →