#21309A#21309A

#21309A is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.6% C 0.171 H 269.4°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#21309A
RGB	rgb(33, 48, 154)
HSL	hsl(233, 65%, 37%)
HSV	hsv(233, 79%, 60%)
CMYK	cmyk(78.6%, 68.8%, 0%, 39.6%)
CIE-LAB	lab(26.07, 33.27, -59.17)
CIE-LCH	lch(26.07, 67.88, 299.35°)
OKLab	oklab(37.61% -0.0018 -0.1713)
OKLCH	oklch(37.61% 0.171 269.4)
XYZ	xyz(7.5149, 4.7695, 31.0901)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21309A #9A8B21

analogous

#216D9A #21309A #4F219A

triadic

#21309A #9A2130 #309A21

tetradic

#21309A #9A216D #9A8B21 #219A4F

square

#21309A #9A216D #9A8B21 #219A4F

split-complementary

#21309A #9A4F21 #6D9A21

monochromatic

#0B1135 #162068 #21309A #2C40CC #5A6ADC

Accessibility & contrast

On white

10.75

#21309A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#21309A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21309A

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21309A	#FFFFFF	#000000	##FFFFFF
##21309A	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449D

Deuteranopia (green-blind)

#003898

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #21309a;
/* rgb */ color: rgb(33, 48, 154);
/* oklch */ color: oklch(37.6% 0.171 269.4);

Tailwind

colors: {
  custom: {
    50: '#7168b9',
    500: '#21309a',
    950: '#000000',
  },
}

SCSS

$custom: #21309a;
$custom-light: #7168b9;
$custom-dark: #000000;

JSON

{
  "hex": "#21309a",
  "rgb": {
    "r": 33,
    "g": 48,
    "b": 154
  },
  "hsl": {
    "h": 232.562,
    "s": 64.706,
    "l": 36.667
  },
  "oklch": {
    "l": 0.37606,
    "c": 0.17129,
    "h": 269.4
  },
  "luminance": 0.0477
}

Semantic roles & 50–950 ramp

primary

#21309A

secondary

#C0B357

accent

#D340E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #21309A

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

Preview Lab → · Contrast checker → · Palette generator →