#2151AC#2151AC

#2151AC is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.7% C 0.155 H 261.6°. Best body text is #FFFFFF at 7.40:1 contrast (WCAG AA passes).

Color values

HEX	#2151AC
RGB	rgb(33, 81, 172)
HSL	hsl(219, 68%, 40%)
HSV	hsv(219, 81%, 67%)
CMYK	cmyk(80.8%, 52.9%, 0%, 32.5%)
CIE-LAB	lab(36.34, 18.16, -53.26)
CIE-LCH	lch(36.34, 56.27, 288.83°)
OKLab	oklab(45.74% -0.0226 -0.1535)
OKLCH	oklch(45.74% 0.155 261.6)
XYZ	xyz(11.0133, 9.1854, 40.2142)
Luminance	0.0919 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151AC #AC7C21

analogous

#2196AC #2151AC #3721AC

triadic

#2151AC #AC2151 #51AC21

tetradic

#2151AC #AC2196 #AC7C21 #21AC37

square

#2151AC #AC2196 #AC7C21 #21AC37

split-complementary

#2151AC #AC3721 #96AC21

monochromatic

#0D2145 #173979 #2151AC #326CD8 #6691E2

Accessibility & contrast

On white

7.40

#2151AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#2151AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151AC

7.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151AC	#FFFFFF	#000000	##FFFFFF
##2151AC	1.00	7.40	2.84	7.40
#FFFFFF	7.40	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E5CAF

Deuteranopia (green-blind)

#004FAA

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #2151ac;
/* rgb */ color: rgb(33, 81, 172);
/* oklch */ color: oklch(45.7% 0.155 261.6);

Tailwind

colors: {
  custom: {
    50: '#7381c5',
    500: '#2151ac',
    950: '#000000',
  },
}

SCSS

$custom: #2151ac;
$custom-light: #7381c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2151ac",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 172
  },
  "hsl": {
    "h": 219.281,
    "s": 67.805,
    "l": 40.196
  },
  "oklch": {
    "l": 0.45738,
    "c": 0.15515,
    "h": 261.6
  },
  "luminance": 0.09187
}

Semantic roles & 50–950 ramp

primary

#2151AC

secondary

#C7A462

accent

#AF3DEB

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2151AC

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

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