#151B55#151B55

#151B55 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.0% C 0.104 H 272.3°. Best body text is #FFFFFF at 15.91:1 contrast (WCAG AA passes).

Color values

HEX	#151B55
RGB	rgb(21, 27, 85)
HSL	hsl(234, 60%, 21%)
HSV	hsv(234, 75%, 33%)
CMYK	cmyk(75.3%, 68.2%, 0%, 66.7%)
CIE-LAB	lab(13.22, 19.50, -36.01)
CIE-LCH	lch(13.22, 40.95, 298.43°)
OKLab	oklab(25.97% 0.0042 -0.1039)
OKLCH	oklch(25.97% 0.104 272.3)
XYZ	xyz(2.3403, 1.5989, 8.7779)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B55 #554F15

analogous

#153B55 #151B55 #2F1555

triadic

#151B55 #55151B #1B5515

tetradic

#151B55 #55153B #554F15 #15552F

square

#151B55 #55153B #554F15 #15552F

split-complementary

#151B55 #552F15 #3B5515

monochromatic

#060819 #090B24 #151B55 #212B86 #2D3AB7

Accessibility & contrast

On white

15.91

#151B55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#151B55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B55

15.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B55	#FFFFFF	#000000	##FFFFFF
##151B55	1.00	15.91	1.32	15.91
#FFFFFF	15.91	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002557

Deuteranopia (green-blind)

#001F54

Tritanopia (blue-blind)

#002A35

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #151b55;
/* rgb */ color: rgb(21, 27, 85);
/* oklch */ color: oklch(26.0% 0.104 272.3);

Tailwind

colors: {
  custom: {
    50: '#5d5785',
    500: '#151b55',
    950: '#000000',
  },
}

SCSS

$custom: #151b55;
$custom-light: #5d5785;
$custom-dark: #000000;

JSON

{
  "hex": "#151b55",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 85
  },
  "hsl": {
    "h": 234.375,
    "s": 60.377,
    "l": 20.784
  },
  "oklch": {
    "l": 0.25973,
    "c": 0.10403,
    "h": 272.3
  },
  "luminance": 0.01599
}

Semantic roles & 50–950 ramp

primary

#151B55

secondary

#8D8539

accent

#D544E4

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #151B55

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

Preview Lab → · Contrast checker → · Palette generator →