#151F4B#151F4B

#151F4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.082 H 270.1°. Best body text is #FFFFFF at 15.80:1 contrast (WCAG AA passes).

Color values

HEX	#151F4B
RGB	rgb(21, 31, 75)
HSL	hsl(229, 56%, 19%)
HSV	hsv(229, 72%, 29%)
CMYK	cmyk(72%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.51, 12.38, -28.71)
CIE-LCH	lch(13.51, 31.27, 293.33°)
OKLab	oklab(25.91% 0.0001 -0.0824)
OKLCH	oklch(25.91% 0.082 270.1)
XYZ	xyz(2.0688, 1.6472, 6.8642)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151F4B #4B4115

analogous

#153A4B #151F4B #26154B

triadic

#151F4B #4B151F #1F4B15

tetradic

#151F4B #4B153A #4B4115 #154B26

square

#151F4B #4B153A #4B4115 #154B26

split-complementary

#151F4B #4B2615 #3A4B15

monochromatic

#070A18 #080B1B #151F4B #22337B #3047AB

Accessibility & contrast

On white

15.80

#151F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#151F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151F4B

15.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151F4B	#FFFFFF	#000000	##FFFFFF
##151F4B	1.00	15.80	1.33	15.80
#FFFFFF	15.80	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04254D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #151f4b;
/* rgb */ color: rgb(21, 31, 75);
/* oklch */ color: oklch(25.9% 0.082 270.1);

Tailwind

colors: {
  custom: {
    50: '#5a5a7e',
    500: '#151f4b',
    950: '#000000',
  },
}

SCSS

$custom: #151f4b;
$custom-light: #5a5a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#151f4b",
  "rgb": {
    "r": 21,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 228.889,
    "s": 56.25,
    "l": 18.824
  },
  "oklch": {
    "l": 0.2591,
    "c": 0.08244,
    "h": 270.1
  },
  "luminance": 0.01647
}

Semantic roles & 50–950 ramp

primary

#151F4B

secondary

#837539

accent

#C448E0

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #151F4B

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

Preview Lab → · Contrast checker → · Palette generator →