#21509B#21509B

#21509B is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.2% C 0.133 H 259.5°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#21509B
RGB	rgb(33, 80, 155)
HSL	hsl(217, 65%, 37%)
HSV	hsv(217, 79%, 61%)
CMYK	cmyk(78.7%, 48.4%, 0%, 39.2%)
CIE-LAB	lab(34.85, 12.10, -45.48)
CIE-LCH	lch(34.85, 47.06, 284.90°)
OKLab	oklab(44.22% -0.0242 -0.1306)
OKLCH	oklch(44.22% 0.133 259.5)
XYZ	xyz(9.4101, 8.4261, 32.1344)
Luminance	0.0843 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21509B #9B6C21

analogous

#218D9B #21509B #2F219B

triadic

#21509B #9B2150 #509B21

tetradic

#21509B #9B218D #9B6C21 #219B2F

square

#21509B #9B218D #9B6C21 #219B2F

split-complementary

#21509B #9B2F21 #8D9B21

monochromatic

#0C1C36 #163669 #21509B #2C6ACD #5A8CDC

Accessibility & contrast

On white

7.82

#21509B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#21509B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21509B

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21509B	#FFFFFF	#000000	##FFFFFF
##21509B	1.00	7.82	2.69	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26589E

Deuteranopia (green-blind)

#004D9A

Tritanopia (blue-blind)

#00626E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #21509b;
/* rgb */ color: rgb(33, 80, 155);
/* oklch */ color: oklch(44.2% 0.133 259.5);

Tailwind

colors: {
  custom: {
    50: '#6f80b9',
    500: '#21509b',
    950: '#000000',
  },
}

SCSS

$custom: #21509b;
$custom-light: #6f80b9;
$custom-dark: #000000;

JSON

{
  "hex": "#21509b",
  "rgb": {
    "r": 33,
    "g": 80,
    "b": 155
  },
  "hsl": {
    "h": 216.885,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.44222,
    "c": 0.13284,
    "h": 259.5
  },
  "luminance": 0.08427
}

Semantic roles & 50–950 ramp

primary

#21509B

secondary

#C09858

accent

#A740E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #21509B

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

Preview Lab → · Contrast checker → · Palette generator →