#1D70B3#1D70B3

#1D70B3 is a mid, vivid cyan. Relative luminance 0.151; OKLCH L 53.2% C 0.130 H 248.2°. Best body text is #FFFFFF at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#1D70B3
RGB	rgb(29, 112, 179)
HSL	hsl(207, 72%, 41%)
HSV	hsv(207, 84%, 70%)
CMYK	cmyk(83.8%, 37.4%, 0%, 29.8%)
CIE-LAB	lab(45.77, 0.49, -42.24)
CIE-LCH	lch(45.77, 42.24, 270.67°)
OKLab	oklab(53.16% -0.0481 -0.1205)
OKLCH	oklch(53.16% 0.13 248.2)
XYZ	xyz(14.4344, 15.1024, 44.7934)
Luminance	0.1510 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D70B3 #B3601D

analogous

#1DB3AB #1D70B3 #1D25B3

triadic

#1D70B3 #B31D70 #70B31D

tetradic

#1D70B3 #AB1DB3 #B3601D #25B31D

square

#1D70B3 #AB1DB3 #B3601D #25B31D

split-complementary

#1D70B3 #B31D25 #B3AB1D

monochromatic

#0C2E4A #144F7E #1D70B3 #3090DD #64ACE6

Accessibility & contrast

On white

5.22

#1D70B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#1D70B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D70B3

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D70B3	#FFFFFF	#000000	##FFFFFF
##1D70B3	1.00	5.22	4.02	5.22
#FFFFFF	5.22	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5074B6

Deuteranopia (green-blind)

#3966B2

Tritanopia (blue-blind)

#008089

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #1d70b3;
/* rgb */ color: rgb(29, 112, 179);
/* oklch */ color: oklch(53.2% 0.130 248.2);

Tailwind

colors: {
  custom: {
    50: '#7398ca',
    500: '#1d70b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d70b3;
$custom-light: #7398ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d70b3",
  "rgb": {
    "r": 29,
    "g": 112,
    "b": 179
  },
  "hsl": {
    "h": 206.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.53159,
    "c": 0.12976,
    "h": 248.2
  },
  "luminance": 0.15104
}

Semantic roles & 50–950 ramp

primary

#1D70B3

secondary

#CB9061

accent

#8A39EF

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0D13

muted

#7C7E82

Preview Lab

Preview with #1D70B3

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

Preview Lab → · Contrast checker → · Palette generator →