#1539B4#1539B4

#1539B4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.197 H 265.1°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#1539B4
RGB	rgb(21, 57, 180)
HSL	hsl(226, 79%, 39%)
HSV	hsv(226, 88%, 71%)
CMYK	cmyk(88.3%, 68.3%, 0%, 29.4%)
CIE-LAB	lab(30.35, 36.31, -67.81)
CIE-LCH	lch(30.35, 76.92, 298.17°)
OKLab	oklab(41.38% -0.0167 -0.1966)
OKLCH	oklch(41.38% 0.197 265.1)
XYZ	xyz(10.0077, 6.3797, 43.8751)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1539B4 #B49015

analogous

#1589B4 #1539B4 #4115B4

triadic

#1539B4 #B41539 #39B415

tetradic

#1539B4 #B41589 #B49015 #15B441

square

#1539B4 #B41589 #B49015 #15B441

split-complementary

#1539B4 #B44115 #89B415

monochromatic

#081646 #0F287D #1539B4 #214DE5 #5879EC

Accessibility & contrast

On white

9.23

#1539B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1539B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1539B4

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1539B4	#FFFFFF	#000000	##FFFFFF
##1539B4	1.00	9.23	2.28	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB8

Deuteranopia (green-blind)

#0040B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1539b4;
/* rgb */ color: rgb(21, 57, 180);
/* oklch */ color: oklch(41.4% 0.197 265.1);

Tailwind

colors: {
  custom: {
    50: '#756fcc',
    500: '#1539b4',
    950: '#000000',
  },
}

SCSS

$custom: #1539b4;
$custom-light: #756fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1539b4",
  "rgb": {
    "r": 21,
    "g": 57,
    "b": 180
  },
  "hsl": {
    "h": 226.415,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41378,
    "c": 0.19734,
    "h": 265.1
  },
  "luminance": 0.06381
}

Semantic roles & 50–950 ramp

primary

#1539B4

secondary

#CFB356

accent

#C932F6

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1539B4

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

Preview Lab → · Contrast checker → · Palette generator →