#2151A9#2151A9

#2151A9 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.5% C 0.151 H 261.2°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#2151A9
RGB	rgb(33, 81, 169)
HSL	hsl(219, 67%, 40%)
HSV	hsv(219, 80%, 66%)
CMYK	cmyk(80.5%, 52.1%, 0%, 33.7%)
CIE-LAB	lab(36.12, 16.98, -51.82)
CIE-LCH	lch(36.12, 54.53, 288.14°)
OKLab	oklab(45.5% -0.023 -0.1493)
OKLCH	oklch(45.5% 0.151 261.2)
XYZ	xyz(10.7285, 9.0715, 38.7140)
Luminance	0.0907 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151A9 #A97921

analogous

#2195A9 #2151A9 #3521A9

triadic

#2151A9 #A92151 #51A921

tetradic

#2151A9 #A92195 #A97921 #21A935

square

#2151A9 #A92195 #A97921 #21A935

split-complementary

#2151A9 #A93521 #95A921

monochromatic

#0D2043 #173876 #2151A9 #316BD7 #6490E1

Accessibility & contrast

On white

7.46

#2151A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#2151A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151A9

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151A9	#FFFFFF	#000000	##FFFFFF
##2151A9	1.00	7.46	2.81	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#155BAC

Deuteranopia (green-blind)

#004FA7

Tritanopia (blue-blind)

#006675

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #2151a9;
/* rgb */ color: rgb(33, 81, 169);
/* oklch */ color: oklch(45.5% 0.151 261.2);

Tailwind

colors: {
  custom: {
    50: '#7381c3',
    500: '#2151a9',
    950: '#000000',
  },
}

SCSS

$custom: #2151a9;
$custom-light: #7381c3;
$custom-dark: #000000;

JSON

{
  "hex": "#2151a9",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 169
  },
  "hsl": {
    "h": 218.824,
    "s": 67.327,
    "l": 39.608
  },
  "oklch": {
    "l": 0.45504,
    "c": 0.15104,
    "h": 261.2
  },
  "luminance": 0.09073
}

Semantic roles & 50–950 ramp

primary

#2151A9

secondary

#C6A260

accent

#AD3EEA

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #2151A9

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

Preview Lab → · Contrast checker → · Palette generator →