#1533B4#1533B4

#1533B4 is a dark, highly saturated blue. Relative luminance 0.058; OKLCH L 40.4% C 0.204 H 265.8°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#1533B4
RGB	rgb(21, 51, 180)
HSL	hsl(229, 79%, 39%)
HSV	hsv(229, 88%, 71%)
CMYK	cmyk(88.3%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(28.96, 40.11, -70.11)
CIE-LCH	lch(28.96, 80.77, 299.77°)
OKLab	oklab(40.37% -0.0148 -0.2033)
OKLCH	oklch(40.37% 0.204 265.8)
XYZ	xyz(9.7284, 5.8211, 43.7820)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1533B4 #B49615

analogous

#1583B4 #1533B4 #4615B4

triadic

#1533B4 #B41533 #33B415

tetradic

#1533B4 #B41583 #B49615 #15B446

square

#1533B4 #B41583 #B49615 #15B446

split-complementary

#1533B4 #B44615 #83B415

monochromatic

#081446 #0F237D #1533B4 #2146E5 #5874EC

Accessibility & contrast

On white

9.70

#1533B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1533B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1533B4

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1533B4	#FFFFFF	#000000	##FFFFFF
##1533B4	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB8

Deuteranopia (green-blind)

#003DB2

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1533b4;
/* rgb */ color: rgb(21, 51, 180);
/* oklch */ color: oklch(40.4% 0.204 265.8);

Tailwind

colors: {
  custom: {
    50: '#756bcc',
    500: '#1533b4',
    950: '#000000',
  },
}

SCSS

$custom: #1533b4;
$custom-light: #756bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1533b4",
  "rgb": {
    "r": 21,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 228.679,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40366,
    "c": 0.20387,
    "h": 265.8
  },
  "luminance": 0.05822
}

Semantic roles & 50–950 ramp

primary

#1533B4

secondary

#CFB856

accent

#D132F6

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0A0614

muted

#7C7A82

Preview Lab

Preview with #1533B4

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

Preview Lab → · Contrast checker → · Palette generator →