#151B71#151B71

#151B71 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.0% C 0.144 H 270.4°. Best body text is #FFFFFF at 14.71:1 contrast (WCAG AA passes).

Color values

HEX	#151B71
RGB	rgb(21, 27, 113)
HSL	hsl(236, 69%, 26%)
HSV	hsv(236, 81%, 44%)
CMYK	cmyk(81.4%, 76.1%, 0%, 55.7%)
CIE-LAB	lab(16.18, 30.45, -49.70)
CIE-LCH	lch(16.18, 58.29, 301.50°)
OKLab	oklab(29.01% 0.001 -0.1439)
OKLCH	oklch(29.01% 0.144 270.4)
XYZ	xyz(3.6808, 2.1351, 15.8377)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B71 #716B15

analogous

#154971 #151B71 #3D1571

triadic

#151B71 #71151B #1B7115

tetradic

#151B71 #711549 #716B15 #15713D

square

#151B71 #711549 #716B15 #15713D

split-complementary

#151B71 #713D15 #497115

monochromatic

#05061A #0B0F3D #151B71 #1F27A5 #2935D7

Accessibility & contrast

On white

14.71

#151B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#151B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B71

14.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B71	#FFFFFF	#000000	##FFFFFF
##151B71	1.00	14.71	1.43	14.71
#FFFFFF	14.71	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D74

Deuteranopia (green-blind)

#00246F

Tritanopia (blue-blind)

#003444

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #151b71;
/* rgb */ color: rgb(21, 27, 113);
/* oklch */ color: oklch(29.0% 0.144 270.4);

Tailwind

colors: {
  custom: {
    50: '#65589b',
    500: '#151b71',
    950: '#000000',
  },
}

SCSS

$custom: #151b71;
$custom-light: #65589b;
$custom-dark: #000000;

JSON

{
  "hex": "#151b71",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 113
  },
  "hsl": {
    "h": 236.087,
    "s": 68.657,
    "l": 26.275
  },
  "oklch": {
    "l": 0.29011,
    "c": 0.14392,
    "h": 270.4
  },
  "luminance": 0.02136
}

Semantic roles & 50–950 ramp

primary

#151B71

secondary

#A7A03B

accent

#E03CEB

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #151B71

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

Preview Lab → · Contrast checker → · Palette generator →