#1B5DB3#1B5DB3

#1B5DB3 is a mid, vivid cyan. Relative luminance 0.113; OKLCH L 48.7% C 0.151 H 257.1°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#1B5DB3
RGB	rgb(27, 93, 179)
HSL	hsl(214, 74%, 40%)
HSV	hsv(214, 85%, 70%)
CMYK	cmyk(84.9%, 48%, 0%, 29.8%)
CIE-LAB	lab(40.11, 12.43, -51.31)
CIE-LCH	lch(40.11, 52.80, 283.62°)
OKLab	oklab(48.73% -0.0337 -0.1476)
OKLCH	oklch(48.73% 0.151 257.1)
XYZ	xyz(12.5000, 11.3148, 44.1642)
Luminance	0.1132 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5DB3 #B3711B

analogous

#1BA9B3 #1B5DB3 #251BB3

triadic

#1B5DB3 #B31B5D #5DB31B

tetradic

#1B5DB3 #B31BA9 #B3711B #1BB325

square

#1B5DB3 #B31BA9 #B3711B #1BB325

split-complementary

#1B5DB3 #B3251B #A9B31B

monochromatic

#0B2649 #13417E #1B5DB3 #2C7ADF #619BE7

Accessibility & contrast

On white

6.44

#1B5DB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#1B5DB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B5DB3

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5DB3	#FFFFFF	#000000	##FFFFFF
##1B5DB3	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B66B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#00727F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #1b5db3;
/* rgb */ color: rgb(27, 93, 179);
/* oklch */ color: oklch(48.7% 0.151 257.1);

Tailwind

colors: {
  custom: {
    50: '#738aca',
    500: '#1b5db3',
    950: '#000000',
  },
}

SCSS

$custom: #1b5db3;
$custom-light: #738aca;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5db3",
  "rgb": {
    "r": 27,
    "g": 93,
    "b": 179
  },
  "hsl": {
    "h": 213.947,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.48734,
    "c": 0.15141,
    "h": 257.1
  },
  "luminance": 0.11316
}

Semantic roles & 50–950 ramp

primary

#1B5DB3

secondary

#CC9C5E

accent

#A037F0

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1B5DB3

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

Preview Lab → · Contrast checker → · Palette generator →