#2151AA#2151AA

#2151AA is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.6% C 0.152 H 261.4°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#2151AA
RGB	rgb(33, 81, 170)
HSL	hsl(219, 67%, 40%)
HSV	hsv(219, 81%, 67%)
CMYK	cmyk(80.6%, 52.4%, 0%, 33.3%)
CIE-LAB	lab(36.19, 17.37, -52.30)
CIE-LCH	lch(36.19, 55.11, 288.38°)
OKLab	oklab(45.58% -0.0228 -0.1507)
OKLCH	oklch(45.58% 0.152 261.4)
XYZ	xyz(10.8227, 9.1092, 39.2103)
Luminance	0.0911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151AA #AA7A21

analogous

#2196AA #2151AA #3521AA

triadic

#2151AA #AA2151 #51AA21

tetradic

#2151AA #AA2196 #AA7A21 #21AA35

square

#2151AA #AA2196 #AA7A21 #21AA35

split-complementary

#2151AA #AA3521 #96AA21

monochromatic

#0D2043 #173977 #2151AA #316BD7 #6490E1

Accessibility & contrast

On white

7.44

#2151AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#2151AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151AA

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151AA	#FFFFFF	#000000	##FFFFFF
##2151AA	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#135CAD

Deuteranopia (green-blind)

#004FA8

Tritanopia (blue-blind)

#006775

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #2151aa;
/* rgb */ color: rgb(33, 81, 170);
/* oklch */ color: oklch(45.6% 0.152 261.4);

Tailwind

colors: {
  custom: {
    50: '#7381c4',
    500: '#2151aa',
    950: '#000000',
  },
}

SCSS

$custom: #2151aa;
$custom-light: #7381c4;
$custom-dark: #000000;

JSON

{
  "hex": "#2151aa",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 170
  },
  "hsl": {
    "h": 218.978,
    "s": 67.488,
    "l": 39.804
  },
  "oklch": {
    "l": 0.45581,
    "c": 0.1524,
    "h": 261.4
  },
  "luminance": 0.0911
}

Semantic roles & 50–950 ramp

primary

#2151AA

secondary

#C6A361

accent

#AE3DEA

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #2151AA

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

Preview Lab → · Contrast checker → · Palette generator →