#1B2F53#1B2F53

#1B2F53 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.8% C 0.070 H 261.3°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F53
RGB	rgb(27, 47, 83)
HSL	hsl(219, 51%, 22%)
HSV	hsv(219, 67%, 33%)
CMYK	cmyk(67.5%, 43.4%, 0%, 67.5%)
CIE-LAB	lab(19.60, 5.08, -24.37)
CIE-LCH	lch(19.60, 24.89, 281.78°)
OKLab	oklab(30.85% -0.0106 -0.0693)
OKLCH	oklch(30.85% 0.07 261.3)
XYZ	xyz(3.0293, 2.8903, 8.5802)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F53 #533F1B

analogous

#1B4B53 #1B2F53 #231B53

triadic

#1B2F53 #531B2F #2F531B

tetradic

#1B2F53 #531B4B #533F1B #1B5323

square

#1B2F53 #531B4B #533F1B #1B5323

split-complementary

#1B2F53 #53231B #4B531B

monochromatic

#080D17 #0C1525 #1B2F53 #2A4981 #3963AF

Accessibility & contrast

On white

13.31

#1B2F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B2F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F53

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F53	#FFFFFF	#000000	##FFFFFF
##1B2F53	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3254

Deuteranopia (green-blind)

#172D52

Tritanopia (blue-blind)

#00373D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2f53;
/* rgb */ color: rgb(27, 47, 83);
/* oklch */ color: oklch(30.8% 0.070 261.3);

Tailwind

colors: {
  custom: {
    50: '#5e6783',
    500: '#1b2f53',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f53;
$custom-light: #5e6783;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f53",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 83
  },
  "hsl": {
    "h": 218.571,
    "s": 50.909,
    "l": 21.569
  },
  "oklch": {
    "l": 0.30846,
    "c": 0.07009,
    "h": 261.3
  },
  "luminance": 0.02891
}

Semantic roles & 50–950 ramp

primary

#1B2F53

secondary

#896F41

accent

#A84DDA

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060A

muted

#797A7C

Preview Lab

Preview with #1B2F53

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

Preview Lab → · Contrast checker → · Palette generator →