#1B5EB3#1B5EB3

#1B5EB3 is a mid, vivid cyan. Relative luminance 0.115; OKLCH L 49.0% C 0.150 H 256.7°. Best body text is #FFFFFF at 6.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B5EB3
RGB	rgb(27, 94, 179)
HSL	hsl(214, 74%, 40%)
HSV	hsv(214, 85%, 70%)
CMYK	cmyk(84.9%, 47.5%, 0%, 29.8%)
CIE-LAB	lab(40.40, 11.78, -50.85)
CIE-LCH	lch(40.40, 52.19, 283.04°)
OKLab	oklab(48.96% -0.0345 -0.1462)
OKLCH	oklch(48.96% 0.15 256.7)
XYZ	xyz(12.5884, 11.4915, 44.1937)
Luminance	0.1149 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5EB3 #B3701B

analogous

#1BAAB3 #1B5EB3 #241BB3

triadic

#1B5EB3 #B31B5E #5EB31B

tetradic

#1B5EB3 #B31BAA #B3701B #1BB324

square

#1B5EB3 #B31BAA #B3701B #1BB324

split-complementary

#1B5EB3 #B3241B #AAB31B

monochromatic

#0B2649 #13427E #1B5EB3 #2C7BDF #619CE7

Accessibility & contrast

On white

6.37

#1B5EB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#1B5EB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B5EB3

6.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5EB3	#FFFFFF	#000000	##FFFFFF
##1B5EB3	1.00	6.37	3.30	6.37
#FFFFFF	6.37	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E66B6

Deuteranopia (green-blind)

#0059B1

Tritanopia (blue-blind)

#007380

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #1b5eb3;
/* rgb */ color: rgb(27, 94, 179);
/* oklch */ color: oklch(49.0% 0.150 256.7);

Tailwind

colors: {
  custom: {
    50: '#738bca',
    500: '#1b5eb3',
    950: '#000000',
  },
}

SCSS

$custom: #1b5eb3;
$custom-light: #738bca;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5eb3",
  "rgb": {
    "r": 27,
    "g": 94,
    "b": 179
  },
  "hsl": {
    "h": 213.553,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.48958,
    "c": 0.15021,
    "h": 256.7
  },
  "luminance": 0.11493
}

Semantic roles & 50–950 ramp

primary

#1B5EB3

secondary

#CC9B5E

accent

#9F37F0

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1B5EB3

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

Preview Lab → · Contrast checker → · Palette generator →