#1B638B#1B638B

#1B638B is a mid, moderate cyan. Relative luminance 0.110; OKLCH L 47.6% C 0.094 H 238.4°. Best body text is #FFFFFF at 6.55:1 contrast (WCAG AA passes).

Color values

HEX#1B638B
RGBrgb(27, 99, 139)
HSLhsl(201, 67%, 33%)
HSVhsv(201, 81%, 55%)
CMYKcmyk(80.6%, 28.8%, 0%, 45.5%)
CIE-LABlab(39.61, -7.09, -28.26)
CIE-LCHlch(39.61, 29.14, 255.93°)
OKLaboklab(47.6% -0.0492 -0.0799)
OKLCHoklch(47.6% 0.094 238.4)
XYZxyz(9.5722, 11.0196, 26.0436)
Luminance0.1102 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B638B #8B431B
analogous
#1B8B7B #1B638B #1B2B8B
triadic
#1B638B #8B1B63 #638B1B
tetradic
#1B638B #7B1B8B #8B431B #2B8B1B
square
#1B638B #7B1B8B #8B431B #2B8B1B
split-complementary
#1B638B #8B1B2B #8B7B1B
monochromatic
#071A25 #113F58 #1B638B #2587BE #45A6DB

Accessibility & contrast

On white

6.55
#1B638B on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.20
#1B638B on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B638B
6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B638B#FFFFFF#000000##FFFFFF
##1B638B1.006.553.206.55
#FFFFFF6.551.0021.001.00
#0000003.2021.001.0021.00
##FFFFFF6.551.0021.001.00

Color blindness preview

Protanopia (red-blind)
#50638D
Deuteranopia (green-blind)
#41598A
Tritanopia (blue-blind)
#006D71
Achromatopsia (no color)
#5D5D5D

Design tokens & code

CSS
--color: #1b638b;
/* rgb */ color: rgb(27, 99, 139);
/* oklch */ color: oklch(47.6% 0.094 238.4);
Tailwind
colors: {
  custom: {
    50: '#6a8fad',
    500: '#1b638b',
    950: '#000000',
  },
}
SCSS
$custom: #1b638b;
$custom-light: #6a8fad;
$custom-dark: #000000;
JSON
{
  "hex": "#1b638b",
  "rgb": {
    "r": 27,
    "g": 99,
    "b": 139
  },
  "hsl": {
    "h": 201.429,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.47597,
    "c": 0.09388,
    "h": 238.4
  },
  "luminance": 0.11021
}

Semantic roles & 50–950 ramp

primary
#1B638B
secondary
#BC7045
accent
#7B3DEA
background
#F6F8FA
surface
#ECF0F4
border
#C7CBCE
text
#070C10
muted
#7A7D7F

Preview Lab

Preview with #1B638B

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

Preview Lab → · Contrast checker → · Palette generator →

#1B638B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva