#1B507E#1B507E

#1B507E is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 42.0% C 0.095 H 248.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B507E
RGB	rgb(27, 80, 126)
HSL	hsl(208, 65%, 30%)
HSV	hsv(208, 79%, 49%)
CMYK	cmyk(78.6%, 36.5%, 0%, 50.6%)
CIE-LAB	lab(32.87, -0.20, -30.94)
CIE-LCH	lch(32.87, 30.94, 269.62°)
OKLab	oklab(42.04% -0.0346 -0.088)
OKLCH	oklch(42.04% 0.095 248.5)
XYZ	xyz(7.0851, 7.4759, 20.8042)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B507E #7E491B

analogous

#1B7E7B #1B507E #1B1E7E

triadic

#1B507E #7E1B50 #507E1B

tetradic

#1B507E #7B1B7E #7E491B #1E7E1B

square

#1B507E #7B1B7E #7E491B #1E7E1B

split-complementary

#1B507E #7E1B1E #7E7B1B

monochromatic

#051019 #10304C #1B507E #2670B0 #3E8FD6

Accessibility & contrast

On white

8.42

#1B507E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B507E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B507E

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B507E	#FFFFFF	#000000	##FFFFFF
##1B507E	1.00	8.42	2.50	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B5280

Deuteranopia (green-blind)

#2C497D

Tritanopia (blue-blind)

#005B61

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b507e;
/* rgb */ color: rgb(27, 80, 126);
/* oklch */ color: oklch(42.0% 0.095 248.5);

Tailwind

colors: {
  custom: {
    50: '#6780a3',
    500: '#1b507e',
    950: '#000000',
  },
}

SCSS

$custom: #1b507e;
$custom-light: #6780a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b507e",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 126
  },
  "hsl": {
    "h": 207.879,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.42042,
    "c": 0.09457,
    "h": 248.5
  },
  "luminance": 0.07477
}

Semantic roles & 50–950 ramp

primary

#1B507E

secondary

#B27643

accent

#8E40E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B507E

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

Preview Lab → · Contrast checker → · Palette generator →