#2155B4#2155B4

#2155B4 is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.2% C 0.161 H 261.2°. Best body text is #FFFFFF at 6.95:1 contrast (WCAG AA passes).

Color values

HEX	#2155B4
RGB	rgb(33, 85, 180)
HSL	hsl(219, 69%, 42%)
HSV	hsv(219, 82%, 71%)
CMYK	cmyk(81.7%, 52.8%, 0%, 29.4%)
CIE-LAB	lab(38.05, 18.64, -55.22)
CIE-LCH	lch(38.05, 58.28, 288.66°)
OKLab	oklab(47.22% -0.0246 -0.1592)
OKLCH	oklch(47.22% 0.161 261.2)
XYZ	xyz(12.1109, 10.1142, 44.4851)
Luminance	0.1012 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2155B4 #B48021

analogous

#219EB4 #2155B4 #3721B4

triadic

#2155B4 #B42155 #55B421

tetradic

#2155B4 #B4219E #B48021 #21B437

square

#2155B4 #B4219E #B48021 #21B437

split-complementary

#2155B4 #B43721 #9EB421

monochromatic

#0E244D #183D80 #2155B4 #3871DA #6B96E4

Accessibility & contrast

On white

6.95

#2155B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#2155B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2155B4

6.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2155B4	#FFFFFF	#000000	##FFFFFF
##2155B4	1.00	6.95	3.02	6.95
#FFFFFF	6.95	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E61B7

Deuteranopia (green-blind)

#0053B2

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #2155b4;
/* rgb */ color: rgb(33, 85, 180);
/* oklch */ color: oklch(47.2% 0.161 261.2);

Tailwind

colors: {
  custom: {
    50: '#7584cb',
    500: '#2155b4',
    950: '#000000',
  },
}

SCSS

$custom: #2155b4;
$custom-light: #7584cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2155b4",
  "rgb": {
    "r": 33,
    "g": 85,
    "b": 180
  },
  "hsl": {
    "h": 218.776,
    "s": 69.014,
    "l": 41.765
  },
  "oklch": {
    "l": 0.47223,
    "c": 0.16108,
    "h": 261.2
  },
  "luminance": 0.10116
}

Semantic roles & 50–950 ramp

primary

#2155B4

secondary

#CAA767

accent

#AE3CEC

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2155B4

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

Preview Lab → · Contrast checker → · Palette generator →