#213FB3#213FB3

#213FB3 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.187 H 266.6°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#213FB3
RGB	rgb(33, 63, 179)
HSL	hsl(228, 69%, 42%)
HSV	hsv(228, 82%, 70%)
CMYK	cmyk(81.6%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(32.11, 32.86, -64.32)
CIE-LCH	lch(32.11, 72.22, 297.06°)
OKLab	oklab(42.74% -0.0111 -0.1862)
OKLCH	oklch(42.74% 0.187 266.6)
XYZ	xyz(10.5385, 7.1318, 43.4602)
Luminance	0.0713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#213FB3 #B39521

analogous

#2188B3 #213FB3 #4C21B3

triadic

#213FB3 #B3213F #3FB321

tetradic

#213FB3 #B32188 #B39521 #21B34C

square

#213FB3 #B32188 #B39521 #21B34C

split-complementary

#213FB3 #B34C21 #88B321

monochromatic

#0E1B4C #172D7F #213FB3 #3759DA #6B84E4

Accessibility & contrast

On white

8.65

#213FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#213FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #213FB3

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##213FB3	#FFFFFF	#000000	##FFFFFF
##213FB3	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #213fb3;
/* rgb */ color: rgb(33, 63, 179);
/* oklch */ color: oklch(42.7% 0.187 266.6);

Tailwind

colors: {
  custom: {
    50: '#7774cb',
    500: '#213fb3',
    950: '#000000',
  },
}

SCSS

$custom: #213fb3;
$custom-light: #7774cb;
$custom-dark: #000000;

JSON

{
  "hex": "#213fb3",
  "rgb": {
    "r": 33,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 227.671,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42743,
    "c": 0.18656,
    "h": 266.6
  },
  "luminance": 0.07133
}

Semantic roles & 50–950 ramp

primary

#213FB3

secondary

#CAB566

accent

#C83CEC

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #213FB3

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

Preview Lab → · Contrast checker → · Palette generator →