#151B57#151B57

#151B57 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.2% C 0.107 H 272.2°. Best body text is #FFFFFF at 15.83:1 contrast (WCAG AA passes).

Color values

HEX	#151B57
RGB	rgb(21, 27, 87)
HSL	hsl(235, 61%, 21%)
HSV	hsv(235, 76%, 34%)
CMYK	cmyk(75.9%, 69%, 0%, 65.9%)
CIE-LAB	lab(13.42, 20.31, -37.05)
CIE-LCH	lch(13.42, 42.25, 298.73°)
OKLab	oklab(26.18% 0.004 -0.107)
OKLCH	oklch(26.18% 0.107 272.2)
XYZ	xyz(2.4209, 1.6312, 9.2022)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B57 #575115

analogous

#153C57 #151B57 #301557

triadic

#151B57 #57151B #1B5715

tetradic

#151B57 #57153C #575115 #155730

square

#151B57 #57153C #575115 #155730

split-complementary

#151B57 #573015 #3C5715

monochromatic

#060819 #090C26 #151B57 #212A88 #2D3ABA

Accessibility & contrast

On white

15.83

#151B57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#151B57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B57

15.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B57	#FFFFFF	#000000	##FFFFFF
##151B57	1.00	15.83	1.33	15.83
#FFFFFF	15.83	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002559

Deuteranopia (green-blind)

#001F56

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #151b57;
/* rgb */ color: rgb(21, 27, 87);
/* oklch */ color: oklch(26.2% 0.107 272.2);

Tailwind

colors: {
  custom: {
    50: '#5d5787',
    500: '#151b57',
    950: '#000000',
  },
}

SCSS

$custom: #151b57;
$custom-light: #5d5787;
$custom-dark: #000000;

JSON

{
  "hex": "#151b57",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 87
  },
  "hsl": {
    "h": 234.545,
    "s": 61.111,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26177,
    "c": 0.10706,
    "h": 272.2
  },
  "luminance": 0.01631
}

Semantic roles & 50–950 ramp

primary

#151B57

secondary

#8F8739

accent

#D644E4

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #151B57

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

Preview Lab → · Contrast checker → · Palette generator →