#1F5FAB#1F5FAB

#1F5FAB is a mid, vivid cyan. Relative luminance 0.114; OKLCH L 48.7% C 0.137 H 255.3°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F5FAB
RGB	rgb(31, 95, 171)
HSL	hsl(213, 69%, 40%)
HSV	hsv(213, 82%, 67%)
CMYK	cmyk(81.9%, 44.4%, 0%, 32.9%)
CIE-LAB	lab(40.27, 8.33, -46.33)
CIE-LCH	lch(40.27, 47.07, 280.19°)
OKLab	oklab(48.72% -0.0348 -0.1328)
OKLCH	oklch(48.72% 0.137 255.3)
XYZ	xyz(12.0052, 11.4145, 40.0907)
Luminance	0.1142 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5FAB #AB6B1F

analogous

#1FA5AB #1F5FAB #251FAB

triadic

#1F5FAB #AB1F5F #5FAB1F

tetradic

#1F5FAB #AB1FA5 #AB6B1F #1FAB25

square

#1F5FAB #AB1FA5 #AB6B1F #1FAB25

split-complementary

#1F5FAB #AB251F #A5AB1F

monochromatic

#0C2543 #164277 #1F5FAB #2E7CD9 #629DE3

Accessibility & contrast

On white

6.40

#1F5FAB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#1F5FAB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5FAB

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5FAB	#FFFFFF	#000000	##FFFFFF
##1F5FAB	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3866AE

Deuteranopia (green-blind)

#1B59A9

Tritanopia (blue-blind)

#00717C

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #1f5fab;
/* rgb */ color: rgb(31, 95, 171);
/* oklch */ color: oklch(48.7% 0.137 255.3);

Tailwind

colors: {
  custom: {
    50: '#728bc4',
    500: '#1f5fab',
    950: '#000000',
  },
}

SCSS

$custom: #1f5fab;
$custom-light: #728bc4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5fab",
  "rgb": {
    "r": 31,
    "g": 95,
    "b": 171
  },
  "hsl": {
    "h": 212.571,
    "s": 69.307,
    "l": 39.608
  },
  "oklch": {
    "l": 0.48722,
    "c": 0.13734,
    "h": 255.3
  },
  "luminance": 0.11416
}

Semantic roles & 50–950 ramp

primary

#1F5FAB

secondary

#C7975E

accent

#9B3CEC

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#090C13

muted

#7B7D82

Preview Lab

Preview with #1F5FAB

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

Preview Lab → · Contrast checker → · Palette generator →