#21539E#21539E

#21539E is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.1% C 0.133 H 258.7°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#21539E
RGB	rgb(33, 83, 158)
HSL	hsl(216, 65%, 37%)
HSV	hsv(216, 79%, 62%)
CMYK	cmyk(79.1%, 47.5%, 0%, 38%)
CIE-LAB	lab(35.94, 11.29, -45.54)
CIE-LCH	lch(35.94, 46.91, 283.93°)
OKLab	oklab(45.12% -0.0262 -0.1307)
OKLCH	oklch(45.12% 0.133 258.7)
XYZ	xyz(9.8898, 8.9773, 33.5527)
Luminance	0.0898 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21539E #9E6C21

analogous

#21929E #21539E #2E219E

triadic

#21539E #9E2153 #539E21

tetradic

#21539E #9E2192 #9E6C21 #219E2E

square

#21539E #9E2192 #9E6C21 #219E2E

split-complementary

#21539E #9E2E21 #929E21

monochromatic

#0C1E39 #16386B #21539E #2C6ED1 #5C90DD

Accessibility & contrast

On white

7.51

#21539E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#21539E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21539E

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21539E	#FFFFFF	#000000	##FFFFFF
##21539E	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A5BA1

Deuteranopia (green-blind)

#074F9D

Tritanopia (blue-blind)

#006571

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #21539e;
/* rgb */ color: rgb(33, 83, 158);
/* oklch */ color: oklch(45.1% 0.133 258.7);

Tailwind

colors: {
  custom: {
    50: '#7082bb',
    500: '#21539e',
    950: '#000000',
  },
}

SCSS

$custom: #21539e;
$custom-light: #7082bb;
$custom-dark: #000000;

JSON

{
  "hex": "#21539e",
  "rgb": {
    "r": 33,
    "g": 83,
    "b": 158
  },
  "hsl": {
    "h": 216,
    "s": 65.445,
    "l": 37.451
  },
  "oklch": {
    "l": 0.45122,
    "c": 0.13333,
    "h": 258.7
  },
  "luminance": 0.08978
}

Semantic roles & 50–950 ramp

primary

#21539E

secondary

#C19859

accent

#A53FE8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #21539E

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

Preview Lab → · Contrast checker → · Palette generator →