#1C55B4#1C55B4

#1C55B4 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.1% C 0.162 H 260.3°. Best body text is #FFFFFF at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#1C55B4
RGB	rgb(28, 85, 180)
HSL	hsl(218, 73%, 41%)
HSV	hsv(218, 84%, 71%)
CMYK	cmyk(84.4%, 52.8%, 0%, 29.4%)
CIE-LAB	lab(37.91, 18.20, -55.45)
CIE-LCH	lch(37.91, 58.36, 288.17°)
OKLab	oklab(47.08% -0.0274 -0.1599)
OKLCH	oklch(47.08% 0.162 260.3)
XYZ	xyz(11.9626, 10.0377, 44.4781)
Luminance	0.1004 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C55B4 #B47B1C

analogous

#1CA1B4 #1C55B4 #2F1CB4

triadic

#1C55B4 #B41C55 #55B41C

tetradic

#1C55B4 #B41CA1 #B47B1C #1CB42F

square

#1C55B4 #B41CA1 #B47B1C #1CB42F

split-complementary

#1C55B4 #B42F1C #A1B41C

monochromatic

#0C234A #143C7F #1C55B4 #2F71DF #6495E7

Accessibility & contrast

On white

6.98

#1C55B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#1C55B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C55B4

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C55B4	#FFFFFF	#000000	##FFFFFF
##1C55B4	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)

#0D60B7

Deuteranopia (green-blind)

#0053B2

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1c55b4;
/* rgb */ color: rgb(28, 85, 180);
/* oklch */ color: oklch(47.1% 0.162 260.3);

Tailwind

colors: {
  custom: {
    50: '#7484cb',
    500: '#1c55b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c55b4;
$custom-light: #7484cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c55b4",
  "rgb": {
    "r": 28,
    "g": 85,
    "b": 180
  },
  "hsl": {
    "h": 217.5,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.4708,
    "c": 0.16227,
    "h": 260.3
  },
  "luminance": 0.10039
}

Semantic roles & 50–950 ramp

primary

#1C55B4

secondary

#CCA360

accent

#AB38F0

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1C55B4

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

Preview Lab → · Contrast checker → · Palette generator →