#1F638B#1F638B

#1F638B is a mid, moderate cyan. Relative luminance 0.111; OKLCH L 47.7% C 0.092 H 239.2°. Best body text is #FFFFFF at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F638B
RGB	rgb(31, 99, 139)
HSL	hsl(202, 64%, 33%)
HSV	hsv(202, 78%, 55%)
CMYK	cmyk(77.7%, 28.8%, 0%, 45.5%)
CIE-LAB	lab(39.71, -6.59, -28.10)
CIE-LCH	lch(39.71, 28.87, 256.79°)
OKLab	oklab(47.7% -0.0473 -0.0794)
OKLCH	oklch(47.7% 0.092 239.2)
XYZ	xyz(9.6853, 11.0779, 26.0489)
Luminance	0.1108 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F638B #8B471F

analogous

#1F8B7D #1F638B #1F2D8B

triadic

#1F638B #8B1F63 #638B1F

tetradic

#1F638B #7D1F8B #8B471F #2D8B1F

square

#1F638B #7D1F8B #8B471F #2D8B1F

split-complementary

#1F638B #8B1F2D #8B7D1F

monochromatic

#091C27 #143F59 #1F638B #2A87BD #4DA4D7

Accessibility & contrast

On white

6.53

#1F638B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#1F638B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F638B

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F638B	#FFFFFF	#000000	##FFFFFF
##1F638B	1.00	6.53	3.22	6.53
#FFFFFF	6.53	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50638D

Deuteranopia (green-blind)

#41598A

Tritanopia (blue-blind)

#006D71

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #1f638b;
/* rgb */ color: rgb(31, 99, 139);
/* oklch */ color: oklch(47.7% 0.092 239.2);

Tailwind

colors: {
  custom: {
    50: '#6b8fad',
    500: '#1f638b',
    950: '#000000',
  },
}

SCSS

$custom: #1f638b;
$custom-light: #6b8fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f638b",
  "rgb": {
    "r": 31,
    "g": 99,
    "b": 139
  },
  "hsl": {
    "h": 202.222,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.47702,
    "c": 0.09244,
    "h": 239.2
  },
  "luminance": 0.11079
}

Semantic roles & 50–950 ramp

primary

#1F638B

secondary

#BA754C

accent

#7E41E7

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#080C10

muted

#7A7D7F

Preview Lab

Preview with #1F638B

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

Preview Lab → · Contrast checker → · Palette generator →