#2155B2#2155B2

#2155B2 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.1% C 0.158 H 261.0°. Best body text is #FFFFFF at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#2155B2
RGB	rgb(33, 85, 178)
HSL	hsl(218, 69%, 41%)
HSV	hsv(218, 81%, 70%)
CMYK	cmyk(81.5%, 52.2%, 0%, 30.2%)
CIE-LAB	lab(37.90, 17.86, -54.28)
CIE-LCH	lch(37.90, 57.14, 288.21°)
OKLab	oklab(47.07% -0.0248 -0.1564)
OKLCH	oklch(47.07% 0.158 261)
XYZ	xyz(11.9087, 10.0332, 43.4198)
Luminance	0.1003 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2155B2 #B27E21

analogous

#219EB2 #2155B2 #3621B2

triadic

#2155B2 #B22155 #55B221

tetradic

#2155B2 #B2219E #B27E21 #21B236

square

#2155B2 #B2219E #B27E21 #21B236

split-complementary

#2155B2 #B23621 #9EB221

monochromatic

#0E244B #173C7E #2155B2 #3671DA #6A96E3

Accessibility & contrast

On white

6.98

#2155B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#2155B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2155B2

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2155B2	#FFFFFF	#000000	##FFFFFF
##2155B2	1.00	6.98	3.01	6.98
#FFFFFF	6.98	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1360B5

Deuteranopia (green-blind)

#0053B0

Tritanopia (blue-blind)

#006C7B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2155b2;
/* rgb */ color: rgb(33, 85, 178);
/* oklch */ color: oklch(47.1% 0.158 261.0);

Tailwind

colors: {
  custom: {
    50: '#7584ca',
    500: '#2155b2',
    950: '#000000',
  },
}

SCSS

$custom: #2155b2;
$custom-light: #7584ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2155b2",
  "rgb": {
    "r": 33,
    "g": 85,
    "b": 178
  },
  "hsl": {
    "h": 218.483,
    "s": 68.72,
    "l": 41.373
  },
  "oklch": {
    "l": 0.47067,
    "c": 0.15837,
    "h": 261
  },
  "luminance": 0.10035
}

Semantic roles & 50–950 ramp

primary

#2155B2

secondary

#C9A566

accent

#AD3CEC

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2155B2

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

Preview Lab → · Contrast checker → · Palette generator →