#1B538C#1B538C

#1B538C is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.7% C 0.110 H 252.2°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#1B538C
RGB	rgb(27, 83, 140)
HSL	hsl(210, 68%, 33%)
HSV	hsv(210, 81%, 55%)
CMYK	cmyk(80.7%, 40.7%, 0%, 45.1%)
CIE-LAB	lab(34.62, 3.42, -36.76)
CIE-LCH	lch(34.62, 36.91, 275.31°)
OKLab	oklab(43.68% -0.0336 -0.105)
OKLCH	oklch(43.68% 0.11 252.2)
XYZ	xyz(8.2771, 8.3120, 25.9740)
Luminance	0.0831 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B538C #8C541B

analogous

#1B8C8C #1B538C #1B1B8C

triadic

#1B538C #8C1B53 #538C1B

tetradic

#1B538C #8C1B8C #8C541B #1B8C1B

square

#1B538C #8C1B8C #8C541B #1B8C1B

split-complementary

#1B538C #8C1B1B #8C8C1B

monochromatic

#071625 #113559 #1B538C #2571BF #4690DB

Accessibility & contrast

On white

7.89

#1B538C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1B538C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B538C

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B538C	#FFFFFF	#000000	##FFFFFF
##1B538C	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#38578E

Deuteranopia (green-blind)

#254D8B

Tritanopia (blue-blind)

#006168

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b538c;
/* rgb */ color: rgb(27, 83, 140);
/* oklch */ color: oklch(43.7% 0.110 252.2);

Tailwind

colors: {
  custom: {
    50: '#6a82ae',
    500: '#1b538c',
    950: '#000000',
  },
}

SCSS

$custom: #1b538c;
$custom-light: #6a82ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b538c",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 140
  },
  "hsl": {
    "h": 210.265,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.43683,
    "c": 0.11025,
    "h": 252.2
  },
  "luminance": 0.08313
}

Semantic roles & 50–950 ramp

primary

#1B538C

secondary

#BD8246

accent

#953DEB

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B538C

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

Preview Lab → · Contrast checker → · Palette generator →