#1B2F58#1B2F58

#1B2F58 is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.2% C 0.078 H 263.1°. Best body text is #FFFFFF at 13.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F58
RGB	rgb(27, 47, 88)
HSL	hsl(220, 53%, 23%)
HSV	hsv(220, 69%, 35%)
CMYK	cmyk(69.3%, 46.6%, 0%, 65.5%)
CIE-LAB	lab(19.92, 7.09, -27.18)
CIE-LCH	lch(19.92, 28.09, 284.63°)
OKLab	oklab(31.2% -0.0094 -0.0775)
OKLCH	oklch(31.2% 0.078 263.1)
XYZ	xyz(3.2293, 2.9703, 9.6338)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F58 #58441B

analogous

#1B4D58 #1B2F58 #261B58

triadic

#1B2F58 #581B2F #2F581B

tetradic

#1B2F58 #581B4D #58441B #1B5826

square

#1B2F58 #581B4D #58441B #1B5826

split-complementary

#1B2F58 #58261B #4D581B

monochromatic

#070D17 #0D1629 #1B2F58 #294887 #3861B6

Accessibility & contrast

On white

13.17

#1B2F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B2F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F58

13.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F58	#FFFFFF	#000000	##FFFFFF
##1B2F58	1.00	13.17	1.59	13.17
#FFFFFF	13.17	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C335A

Deuteranopia (green-blind)

#122E57

Tritanopia (blue-blind)

#00383F

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2f58;
/* rgb */ color: rgb(27, 47, 88);
/* oklch */ color: oklch(31.2% 0.078 263.1);

Tailwind

colors: {
  custom: {
    50: '#5f6787',
    500: '#1b2f58',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f58;
$custom-light: #5f6787;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f58",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 88
  },
  "hsl": {
    "h": 220.328,
    "s": 53.043,
    "l": 22.549
  },
  "oklch": {
    "l": 0.31204,
    "c": 0.07811,
    "h": 263.1
  },
  "luminance": 0.02971
}

Semantic roles & 50–950 ramp

primary

#1B2F58

secondary

#8E7541

accent

#AD4BDC

background

#F5F6F8

surface

#EAEBEF

border

#C6C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B2F58

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

Preview Lab → · Contrast checker → · Palette generator →