#2533B0#2533B0

#2533B0 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.5% C 0.195 H 269.5°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#2533B0
RGB	rgb(37, 51, 176)
HSL	hsl(234, 65%, 42%)
HSV	hsv(234, 79%, 69%)
CMYK	cmyk(79%, 71%, 0%, 31%)
CIE-LAB	lab(29.14, 39.72, -67.39)
CIE-LCH	lch(29.14, 78.22, 300.51°)
OKLab	oklab(40.55% -0.0016 -0.1952)
OKLCH	oklch(40.55% 0.195 269.5)
XYZ	xyz(9.7806, 5.8944, 41.6881)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2533B0 #B0A225

analogous

#2579B0 #2533B0 #5D25B0

triadic

#2533B0 #B02533 #33B025

tetradic

#2533B0 #B02579 #B0A225 #25B05D

square

#2533B0 #B02579 #B0A225 #25B05D

split-complementary

#2533B0 #B05D25 #79B025

monochromatic

#10164B #1A247D #2533B0 #3C4CD6 #6F7AE1

Accessibility & contrast

On white

9.64

#2533B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#2533B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2533B0

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2533B0	#FFFFFF	#000000	##FFFFFF
##2533B0	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB4

Deuteranopia (green-blind)

#003EAE

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2533b0;
/* rgb */ color: rgb(37, 51, 176);
/* oklch */ color: oklch(40.5% 0.195 269.5);

Tailwind

colors: {
  custom: {
    50: '#786bc9',
    500: '#2533b0',
    950: '#000000',
  },
}

SCSS

$custom: #2533b0;
$custom-light: #786bc9;
$custom-dark: #000000;

JSON

{
  "hex": "#2533b0",
  "rgb": {
    "r": 37,
    "g": 51,
    "b": 176
  },
  "hsl": {
    "h": 233.957,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.40546,
    "c": 0.19519,
    "h": 269.5
  },
  "luminance": 0.05896
}

Semantic roles & 50–950 ramp

primary

#2533B0

secondary

#C7BE6A

accent

#D740E8

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2533B0

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

Preview Lab → · Contrast checker → · Palette generator →