#1780B4#1780B4

#1780B4 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.0% C 0.118 H 237.4°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#1780B4
RGB	rgb(23, 128, 180)
HSL	hsl(200, 77%, 40%)
HSV	hsv(200, 87%, 71%)
CMYK	cmyk(87.2%, 28.9%, 0%, 29.4%)
CIE-LAB	lab(50.59, -9.18, -35.23)
CIE-LCH	lch(50.59, 36.40, 255.40°)
OKLab	oklab(56.95% -0.0638 -0.0998)
OKLCH	oklch(56.95% 0.118 237.4)
XYZ	xyz(16.3074, 18.9137, 45.9624)
Luminance	0.1892 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1780B4 #B44B17

analogous

#17B49A #1780B4 #1731B4

triadic

#1780B4 #B41780 #80B417

tetradic

#1780B4 #9A17B4 #B44B17 #31B417

square

#1780B4 #9A17B4 #B44B17 #31B417

split-complementary

#1780B4 #B41731 #B49A17

monochromatic

#093347 #10597E #1780B4 #25A4E3 #5BBBEA

Accessibility & contrast

On white

4.39

#1780B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#1780B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1780B4

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1780B4	#FFFFFF	#000000	##000000
##1780B4	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B6

Deuteranopia (green-blind)

#5272B3

Tritanopia (blue-blind)

#008D92

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #1780b4;
/* rgb */ color: rgb(23, 128, 180);
/* oklch */ color: oklch(57.0% 0.118 237.4);

Tailwind

colors: {
  custom: {
    50: '#73a4ca',
    500: '#1780b4',
    950: '#000000',
  },
}

SCSS

$custom: #1780b4;
$custom-light: #73a4ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1780b4",
  "rgb": {
    "r": 23,
    "g": 128,
    "b": 180
  },
  "hsl": {
    "h": 199.873,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.56951,
    "c": 0.11847,
    "h": 237.4
  },
  "luminance": 0.18916
}

Semantic roles & 50–950 ramp

primary

#1780B4

secondary

#CE8059

accent

#7434F4

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #1780B4

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

Preview Lab → · Contrast checker → · Palette generator →