#1537B4#1537B4

#1537B4 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.0% C 0.200 H 265.4°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#1537B4
RGB	rgb(21, 55, 180)
HSL	hsl(227, 79%, 39%)
HSV	hsv(227, 88%, 71%)
CMYK	cmyk(88.3%, 69.4%, 0%, 29.4%)
CIE-LAB	lab(29.88, 37.60, -68.59)
CIE-LCH	lch(29.88, 78.22, 298.73°)
OKLab	oklab(41.03% -0.016 -0.1989)
OKLCH	oklch(41.03% 0.2 265.4)
XYZ	xyz(9.9108, 6.1858, 43.8428)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1537B4 #B49215

analogous

#1587B4 #1537B4 #4315B4

triadic

#1537B4 #B41537 #37B415

tetradic

#1537B4 #B41587 #B49215 #15B443

square

#1537B4 #B41587 #B49215 #15B443

split-complementary

#1537B4 #B44315 #87B415

monochromatic

#081646 #0F267D #1537B4 #214BE5 #5877EC

Accessibility & contrast

On white

9.39

#1537B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1537B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1537B4

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1537B4	#FFFFFF	#000000	##FFFFFF
##1537B4	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB8

Deuteranopia (green-blind)

#003FB2

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1537b4;
/* rgb */ color: rgb(21, 55, 180);
/* oklch */ color: oklch(41.0% 0.200 265.4);

Tailwind

colors: {
  custom: {
    50: '#756ecc',
    500: '#1537b4',
    950: '#000000',
  },
}

SCSS

$custom: #1537b4;
$custom-light: #756ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#1537b4",
  "rgb": {
    "r": 21,
    "g": 55,
    "b": 180
  },
  "hsl": {
    "h": 227.17,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41032,
    "c": 0.19956,
    "h": 265.4
  },
  "luminance": 0.06187
}

Semantic roles & 50–950 ramp

primary

#1537B4

secondary

#CFB556

accent

#CC32F6

background

#F7F6FC

surface

#EEEBF9

border

#C9C6D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1537B4

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

Preview Lab → · Contrast checker → · Palette generator →