#1B3E63#1B3E63

#1B3E63 is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.8% C 0.076 H 251.9°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E63
RGB	rgb(27, 62, 99)
HSL	hsl(211, 57%, 25%)
HSV	hsv(211, 73%, 39%)
CMYK	cmyk(72.7%, 37.4%, 0%, 61.2%)
CIE-LAB	lab(25.50, 1.01, -25.53)
CIE-LCH	lch(25.50, 25.55, 272.26°)
OKLab	oklab(35.76% -0.0237 -0.0725)
OKLCH	oklch(35.76% 0.076 251.9)
XYZ	xyz(4.4259, 4.5787, 12.4525)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E63 #63401B

analogous

#1B6263 #1B3E63 #1C1B63

triadic

#1B3E63 #631B3E #3E631B

tetradic

#1B3E63 #631B62 #63401B #1B631C

square

#1B3E63 #631B62 #63401B #1B631C

split-complementary

#1B3E63 #631C1B #62631B

monochromatic

#070F18 #0E2033 #1B3E63 #285C93 #357AC3

Accessibility & contrast

On white

10.96

#1B3E63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B3E63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E63

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E63	#FFFFFF	#000000	##FFFFFF
##1B3E63	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4065

Deuteranopia (green-blind)

#233962

Tritanopia (blue-blind)

#00474B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b3e63;
/* rgb */ color: rgb(27, 62, 99);
/* oklch */ color: oklch(35.8% 0.076 251.9);

Tailwind

colors: {
  custom: {
    50: '#61738f',
    500: '#1b3e63',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e63;
$custom-light: #61738f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e63",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 99
  },
  "hsl": {
    "h": 210.833,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35758,
    "c": 0.07626,
    "h": 251.9
  },
  "luminance": 0.04579
}

Semantic roles & 50–950 ramp

primary

#1B3E63

secondary

#986E41

accent

#9647E0

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05080C

muted

#7A7B7D

Preview Lab

Preview with #1B3E63

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

Preview Lab → · Contrast checker → · Palette generator →