#1553B4#1553B4

#1553B4 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.5% C 0.166 H 259.8°. Best body text is #FFFFFF at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#1553B4
RGB	rgb(21, 83, 180)
HSL	hsl(217, 79%, 39%)
HSV	hsv(217, 88%, 71%)
CMYK	cmyk(88.3%, 53.9%, 0%, 29.4%)
CIE-LAB	lab(37.19, 19.02, -56.63)
CIE-LCH	lch(37.19, 59.74, 288.57°)
OKLab	oklab(46.48% -0.0295 -0.1635)
OKLCH	oklch(46.48% 0.166 259.8)
XYZ	xyz(11.6377, 9.6397, 44.4184)
Luminance	0.0964 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1553B4 #B47615

analogous

#15A2B4 #1553B4 #2715B4

triadic

#1553B4 #B41553 #53B415

tetradic

#1553B4 #B415A2 #B47615 #15B427

square

#1553B4 #B415A2 #B47615 #15B427

split-complementary

#1553B4 #B42715 #A2B415

monochromatic

#082046 #0F3A7D #1553B4 #216EE5 #5891EC

Accessibility & contrast

On white

7.17

#1553B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#1553B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1553B4

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1553B4	#FFFFFF	#000000	##FFFFFF
##1553B4	1.00	7.17	2.93	7.17
#FFFFFF	7.17	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB7

Deuteranopia (green-blind)

#0051B2

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1553b4;
/* rgb */ color: rgb(21, 83, 180);
/* oklch */ color: oklch(46.5% 0.166 259.8);

Tailwind

colors: {
  custom: {
    50: '#7382cb',
    500: '#1553b4',
    950: '#000000',
  },
}

SCSS

$custom: #1553b4;
$custom-light: #7382cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1553b4",
  "rgb": {
    "r": 21,
    "g": 83,
    "b": 180
  },
  "hsl": {
    "h": 216.604,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.46484,
    "c": 0.16615,
    "h": 259.8
  },
  "luminance": 0.09641
}

Semantic roles & 50–950 ramp

primary

#1553B4

secondary

#CFA056

accent

#A932F6

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1553B4

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

Preview Lab → · Contrast checker → · Palette generator →