#1F78B4#1F78B4

#1F78B4 is a mid, vivid cyan. Relative luminance 0.170; OKLCH L 55.2% C 0.123 H 243.9°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F78B4
RGB	rgb(31, 120, 180)
HSL	hsl(204, 71%, 41%)
HSV	hsv(204, 83%, 71%)
CMYK	cmyk(82.8%, 33.3%, 0%, 29.4%)
CIE-LAB	lab(48.28, -3.81, -38.84)
CIE-LCH	lch(48.28, 39.03, 264.40°)
OKLab	oklab(55.16% -0.054 -0.1104)
OKLCH	oklch(55.16% 0.123 243.9)
XYZ	xyz(15.5165, 17.0176, 45.6381)
Luminance	0.1702 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F78B4 #B45B1F

analogous

#1FB4A6 #1F78B4 #1F2EB4

triadic

#1F78B4 #B41F78 #78B41F

tetradic

#1F78B4 #A61FB4 #B45B1F #2EB41F

square

#1F78B4 #A61FB4 #B45B1F #2EB41F

split-complementary

#1F78B4 #B41F2E #B4A61F

monochromatic

#0D324C #165580 #1F78B4 #3498DC #68B3E5

Accessibility & contrast

On white

4.77

#1F78B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#1F78B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F78B4

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F78B4	#FFFFFF	#000000	##FFFFFF
##1F78B4	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7AB7

Deuteranopia (green-blind)

#476DB3

Tritanopia (blue-blind)

#00878E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #1f78b4;
/* rgb */ color: rgb(31, 120, 180);
/* oklch */ color: oklch(55.2% 0.123 243.9);

Tailwind

colors: {
  custom: {
    50: '#749ecb',
    500: '#1f78b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f78b4;
$custom-light: #749ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f78b4",
  "rgb": {
    "r": 31,
    "g": 120,
    "b": 180
  },
  "hsl": {
    "h": 204.161,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.55163,
    "c": 0.12292,
    "h": 243.9
  },
  "luminance": 0.1702
}

Semantic roles & 50–950 ramp

primary

#1F78B4

secondary

#CB8D64

accent

#823AED

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #1F78B4

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

Preview Lab → · Contrast checker → · Palette generator →