#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
RGB	rgb(27, 99, 139)
HSL	hsl(201, 67%, 33%)
HSV	hsv(201, 81%, 55%)
CMYK	cmyk(80.6%, 28.8%, 0%, 45.5%)
CIE-LAB	lab(39.61, -7.09, -28.26)
CIE-LCH	lch(39.61, 29.14, 255.93°)
OKLab	oklab(47.6% -0.0492 -0.0799)
OKLCH	oklch(47.6% 0.094 238.4)
XYZ	xyz(9.5722, 11.0196, 26.0436)
Luminance	0.1102 (WCAG relative)
Temperature	cool
Family	cyan

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
##1B638B	1.00	6.55	3.20	6.55
#FFFFFF	6.55	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.55	1.00	21.00	1.00

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 →